diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 9b422a812..41e1ed7ed 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -122,6 +122,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 -1
 #define TEMP_SENSOR_1 -1
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 0
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -139,6 +140,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -147,6 +149,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 275
 #define HEATER_1_MAXTEMP 275
 #define HEATER_2_MAXTEMP 275
+#define HEATER_3_MAXTEMP 275
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -323,11 +326,6 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 //#define DISABLE_MAX_ENDSTOPS
 //#define DISABLE_MIN_ENDSTOPS
 
-// Disable max endstops for compatibility with endstop checking routine
-#if defined(COREXY) && !defined(DISABLE_MAX_ENDSTOPS)
-  #define DISABLE_MAX_ENDSTOPS
-#endif
-
 // For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
 #define X_ENABLE_ON 0
 #define Y_ENABLE_ON 0
@@ -341,12 +339,13 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define DISABLE_E false // For all extruders
 #define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled
 
-#define INVERT_X_DIR true    // for Mendel set to false, for Orca set to true
+#define INVERT_X_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -586,6 +585,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -619,6 +624,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 64c43cab6..3917b0a1e 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -659,6 +659,15 @@ void setup()
   digitalWrite(SERVO0_PIN, LOW); // turn it off
 #endif // Z_PROBE_SLED
   setup_homepin();
+  
+#ifdef STAT_LED_RED
+  pinMode(STAT_LED_RED, OUTPUT);
+  digitalWrite(STAT_LED_RED, LOW); // turn it off
+#endif
+#ifdef STAT_LED_BLUE
+  pinMode(STAT_LED_BLUE, OUTPUT);
+  digitalWrite(STAT_LED_BLUE, LOW); // turn it off
+#endif  
 }
 
 
diff --git a/Marlin/dogm_lcd_implementation.h b/Marlin/dogm_lcd_implementation.h
index 1ccff63e3..f512d3295 100644
--- a/Marlin/dogm_lcd_implementation.h
+++ b/Marlin/dogm_lcd_implementation.h
@@ -92,6 +92,9 @@ U8GLIB_ST7920_128X64_RRD u8g(0);
 #elif defined(MAKRPANEL)
 // The MaKrPanel display, ST7565 controller as well
 U8GLIB_NHD_C12864 u8g(DOGLCD_CS, DOGLCD_A0);
+#elif defined(VIKI2) || defined(miniVIKI)
+// Mini Viki and Viki 2.0 LCD, ST7565 controller as well
+U8GLIB_NHD_C12864 u8g(DOGLCD_CS, DOGLCD_A0);
 #else
 // for regular DOGM128 display with HW-SPI
 U8GLIB_DOGM128 u8g(DOGLCD_CS, DOGLCD_A0);  // HW-SPI Com: CS, A0
diff --git a/Marlin/example_configurations/Hephestos/Configuration.h b/Marlin/example_configurations/Hephestos/Configuration.h
index 2823f2d95..93a0f1809 100644
--- a/Marlin/example_configurations/Hephestos/Configuration.h
+++ b/Marlin/example_configurations/Hephestos/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -122,6 +122,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 1
 #define TEMP_SENSOR_1 0
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 0
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -139,6 +140,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -147,6 +149,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 260
 #define HEATER_1_MAXTEMP 260
 #define HEATER_2_MAXTEMP 260
+#define HEATER_3_MAXTEMP 260
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -351,8 +354,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -587,6 +591,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 #define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -620,6 +630,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/K8200/Configuration.h b/Marlin/example_configurations/K8200/Configuration.h
index 06e944b19..e17ee9e33 100644
--- a/Marlin/example_configurations/K8200/Configuration.h
+++ b/Marlin/example_configurations/K8200/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -124,6 +124,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 5
 #define TEMP_SENSOR_1 0
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 5
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -141,6 +142,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -149,6 +151,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 275
 #define HEATER_1_MAXTEMP 275
 #define HEATER_2_MAXTEMP 275
+#define HEATER_3_MAXTEMP 275
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -357,10 +360,11 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 
 #define INVERT_X_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
-#define INVERT_Z_DIR false     // for Mendel set to false, for Orca set to true
+#define INVERT_Z_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR true    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -597,6 +601,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -630,6 +640,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/SCARA/Configuration.h b/Marlin/example_configurations/SCARA/Configuration.h
index 8bc4eb70e..43a94f705 100644
--- a/Marlin/example_configurations/SCARA/Configuration.h
+++ b/Marlin/example_configurations/SCARA/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -142,6 +142,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 1
 #define TEMP_SENSOR_1 0
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 1
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -159,6 +160,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -167,6 +169,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 275
 #define HEATER_1_MAXTEMP 275
 #define HEATER_2_MAXTEMP 275
+#define HEATER_3_MAXTEMP 275
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -380,8 +383,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstop	s when homing; 1=MAX, -1=MIN
@@ -590,6 +594,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -623,6 +633,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/SCARA/Configuration_adv.h b/Marlin/example_configurations/SCARA/Configuration_adv.h
index 43320500f..215ee494d 100644
--- a/Marlin/example_configurations/SCARA/Configuration_adv.h
+++ b/Marlin/example_configurations/SCARA/Configuration_adv.h
@@ -78,6 +78,7 @@
 #define EXTRUDER_0_AUTO_FAN_PIN   -1
 #define EXTRUDER_1_AUTO_FAN_PIN   -1
 #define EXTRUDER_2_AUTO_FAN_PIN   -1
+#define EXTRUDER_3_AUTO_FAN_PIN   -1
 #define EXTRUDER_AUTO_FAN_TEMPERATURE 50
 #define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed
 
@@ -478,6 +479,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #define THERMISTORHEATER_2 TEMP_SENSOR_2
   #define HEATER_2_USES_THERMISTOR
 #endif
+#if TEMP_SENSOR_3 > 0
+  #define THERMISTORHEATER_3 TEMP_SENSOR_3
+  #define HEATER_3_USES_THERMISTOR
+#endif
 #if TEMP_SENSOR_BED > 0
   #define THERMISTORBED TEMP_SENSOR_BED
   #define BED_USES_THERMISTOR
@@ -491,6 +496,9 @@ const unsigned int dropsegments=5; //everything with less than this number of st
 #if TEMP_SENSOR_2 == -1
   #define HEATER_2_USES_AD595
 #endif
+#if TEMP_SENSOR_3 == -1
+  #define HEATER_3_USES_AD595
+#endif
 #if TEMP_SENSOR_BED == -1
   #define BED_USES_AD595
 #endif
@@ -509,6 +517,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #undef HEATER_2_MINTEMP
   #undef HEATER_2_MAXTEMP
 #endif
+#if TEMP_SENSOR_3 == 0
+  #undef HEATER_3_MINTEMP
+  #undef HEATER_3_MAXTEMP
+#endif
 #if TEMP_SENSOR_BED == 0
   #undef BED_MINTEMP
   #undef BED_MAXTEMP
diff --git a/Marlin/example_configurations/WITBOX/Configuration.h b/Marlin/example_configurations/WITBOX/Configuration.h
index 4a12bda51..02aa94b2d 100644
--- a/Marlin/example_configurations/WITBOX/Configuration.h
+++ b/Marlin/example_configurations/WITBOX/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -125,6 +125,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 1
 #define TEMP_SENSOR_1 0
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 0
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -142,6 +143,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -150,6 +152,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 260
 #define HEATER_1_MAXTEMP 260
 #define HEATER_2_MAXTEMP 260
+#define HEATER_3_MAXTEMP 260
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -351,12 +354,13 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define DISABLE_E false // For all extruders
 #define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled
 
-#define INVERT_X_DIR true    // for Mendel set to false, for Orca set to true
+#define INVERT_X_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -591,6 +595,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 #define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -624,6 +634,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/delta/Configuration.h b/Marlin/example_configurations/delta/Configuration.h
index 3eb268041..ba5f6590a 100644
--- a/Marlin/example_configurations/delta/Configuration.h
+++ b/Marlin/example_configurations/delta/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -147,6 +147,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 -1
 #define TEMP_SENSOR_1 -1
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 0
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -164,6 +165,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -172,6 +174,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 275
 #define HEATER_1_MAXTEMP 275
 #define HEATER_2_MAXTEMP 275
+#define HEATER_3_MAXTEMP 275
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -368,8 +371,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_Z_DIR false
 
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -495,6 +499,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -535,6 +545,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/delta/Configuration_adv.h b/Marlin/example_configurations/delta/Configuration_adv.h
index b3fd53248..79d2036a0 100644
--- a/Marlin/example_configurations/delta/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/Configuration_adv.h
@@ -78,6 +78,7 @@
 #define EXTRUDER_0_AUTO_FAN_PIN   -1
 #define EXTRUDER_1_AUTO_FAN_PIN   -1
 #define EXTRUDER_2_AUTO_FAN_PIN   -1
+#define EXTRUDER_3_AUTO_FAN_PIN   -1
 #define EXTRUDER_AUTO_FAN_TEMPERATURE 50
 #define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed
 
@@ -472,6 +473,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #define THERMISTORHEATER_2 TEMP_SENSOR_2
   #define HEATER_2_USES_THERMISTOR
 #endif
+#if TEMP_SENSOR_3 > 0
+  #define THERMISTORHEATER_3 TEMP_SENSOR_3
+  #define HEATER_3_USES_THERMISTOR
+#endif
 #if TEMP_SENSOR_BED > 0
   #define THERMISTORBED TEMP_SENSOR_BED
   #define BED_USES_THERMISTOR
@@ -485,6 +490,9 @@ const unsigned int dropsegments=5; //everything with less than this number of st
 #if TEMP_SENSOR_2 == -1
   #define HEATER_2_USES_AD595
 #endif
+#if TEMP_SENSOR_3 == -1
+  #define HEATER_3_USES_AD595
+#endif
 #if TEMP_SENSOR_BED == -1
   #define BED_USES_AD595
 #endif
@@ -503,6 +511,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #undef HEATER_2_MINTEMP
   #undef HEATER_2_MAXTEMP
 #endif
+#if TEMP_SENSOR_3 == 0
+  #undef HEATER_3_MINTEMP
+  #undef HEATER_3_MAXTEMP
+#endif
 #if TEMP_SENSOR_BED == 0
   #undef BED_MINTEMP
   #undef BED_MAXTEMP
diff --git a/Marlin/example_configurations/makibox/Configuration.h b/Marlin/example_configurations/makibox/Configuration.h
index 99feceba8..e054918b9 100644
--- a/Marlin/example_configurations/makibox/Configuration.h
+++ b/Marlin/example_configurations/makibox/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -127,6 +127,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 1
 #define TEMP_SENSOR_1 0
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 12
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -144,6 +145,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -152,6 +154,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 275
 #define HEATER_1_MAXTEMP 275
 #define HEATER_2_MAXTEMP 275
+#define HEATER_3_MAXTEMP 275
 #define BED_MAXTEMP 150
 
 // If your bed has low resistance e.g. .6 ohm and throws the fuse you can duty cycle it to reduce the
@@ -352,9 +355,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_X_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR false    // for Mendel set to false, for Orca set to true
-#define INVERT_E0_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E0_DIR true    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -565,6 +569,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -598,6 +608,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/makibox/Configuration_adv.h b/Marlin/example_configurations/makibox/Configuration_adv.h
index e6a3c1ccd..6c181fb55 100644
--- a/Marlin/example_configurations/makibox/Configuration_adv.h
+++ b/Marlin/example_configurations/makibox/Configuration_adv.h
@@ -78,6 +78,7 @@
 #define EXTRUDER_0_AUTO_FAN_PIN   -1
 #define EXTRUDER_1_AUTO_FAN_PIN   -1
 #define EXTRUDER_2_AUTO_FAN_PIN   -1
+#define EXTRUDER_3_AUTO_FAN_PIN   -1
 #define EXTRUDER_AUTO_FAN_TEMPERATURE 50
 #define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed
 
@@ -469,6 +470,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #define THERMISTORHEATER_2 TEMP_SENSOR_2
   #define HEATER_2_USES_THERMISTOR
 #endif
+#if TEMP_SENSOR_3 > 0
+  #define THERMISTORHEATER_3 TEMP_SENSOR_3
+  #define HEATER_3_USES_THERMISTOR
+#endif
 #if TEMP_SENSOR_BED > 0
   #define THERMISTORBED TEMP_SENSOR_BED
   #define BED_USES_THERMISTOR
@@ -482,6 +487,9 @@ const unsigned int dropsegments=5; //everything with less than this number of st
 #if TEMP_SENSOR_2 == -1
   #define HEATER_2_USES_AD595
 #endif
+#if TEMP_SENSOR_3 == -1
+  #define HEATER_3_USES_AD595
+#endif
 #if TEMP_SENSOR_BED == -1
   #define BED_USES_AD595
 #endif
@@ -500,6 +508,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #undef HEATER_2_MINTEMP
   #undef HEATER_2_MAXTEMP
 #endif
+#if TEMP_SENSOR_3 == 0
+  #undef HEATER_3_MINTEMP
+  #undef HEATER_3_MAXTEMP
+#endif
 #if TEMP_SENSOR_BED == 0
   #undef BED_MINTEMP
   #undef BED_MAXTEMP
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration.h b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
index 4ca415d8f..fccc267f2 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
@@ -1,4 +1,4 @@
-#ifndef CONFIGURATION_H
+#ifndef CONFIGURATION_H
 #define CONFIGURATION_H
 
 #include "boards.h"
@@ -126,6 +126,7 @@ Here are some standard links for getting your machine calibrated:
 #define TEMP_SENSOR_0 5
 #define TEMP_SENSOR_1 0
 #define TEMP_SENSOR_2 0
+#define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_BED 5
 
 // This makes temp sensor 1 a redundant sensor for sensor 0. If the temperatures difference between these sensors is to high the print will be aborted.
@@ -143,6 +144,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MINTEMP 5
 #define HEATER_1_MINTEMP 5
 #define HEATER_2_MINTEMP 5
+#define HEATER_3_MINTEMP 5
 #define BED_MINTEMP 5
 
 // When temperature exceeds max temp, your heater will be switched off.
@@ -151,6 +153,7 @@ Here are some standard links for getting your machine calibrated:
 #define HEATER_0_MAXTEMP 275
 #define HEATER_1_MAXTEMP 275
 #define HEATER_2_MAXTEMP 275
+#define HEATER_3_MAXTEMP 275
 #define BED_MAXTEMP 150
 
 #define CONFIG_STEPPERS_TOSHIBA	1
@@ -353,11 +356,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled
 
 #define INVERT_X_DIR false    // for Mendel set to false, for Orca set to true
-#define INVERT_Y_DIR true    // for Mendel set to true, for Orca set to false
-#define INVERT_Z_DIR false     // for Mendel set to false, for Orca set to true
+#define INVERT_Y_DIR true     // for Mendel set to true, for Orca set to false
+#define INVERT_Z_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN
@@ -578,6 +582,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 // http://reprap.org/wiki/MaKr3d_MaKrPanel
 //#define MAKRPANEL
 
+// The Panucatt Devices Viki 2.0 and mini Viki with Graphic LCD
+// http://panucatt.com
+// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: http://code.google.com/p/u8glib/wiki/u8glib
+//#define VIKI2
+//#define miniVIKI
+
 // The RepRapDiscount Smart Controller (white PCB)
 // http://reprap.org/wiki/RepRapDiscount_Smart_Controller
 //#define REPRAP_DISCOUNT_SMART_CONTROLLER
@@ -611,6 +621,22 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
  #define DEFAULT_LCD_CONTRAST 17
 #endif
 
+#if defined(miniVIKI) || defined(VIKI2)
+ #define ULTRA_LCD  //general LCD support, also 16x2
+ #define DOGLCD  // Support for SPI LCD 128x64 (Controller ST7565R graphic Display Family)
+ #define ULTIMAKERCONTROLLER //as available from the Ultimaker online store.
+ 
+  #ifdef miniVIKI
+   #define DEFAULT_LCD_CONTRAST 95
+  #else
+   #define DEFAULT_LCD_CONTRAST 40
+  #endif
+  
+ #define ENCODER_PULSES_PER_STEP 4
+ #define ENCODER_STEPS_PER_MENU_ITEM 1
+#endif
+
+
 #if defined (REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER)
  #define DOGLCD
  #define U8GLIB_ST7920
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h b/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
index fc3c3f53c..64fd9ecc9 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
@@ -78,6 +78,7 @@
 #define EXTRUDER_0_AUTO_FAN_PIN   -1
 #define EXTRUDER_1_AUTO_FAN_PIN   -1
 #define EXTRUDER_2_AUTO_FAN_PIN   -1
+#define EXTRUDER_3_AUTO_FAN_PIN   -1
 #define EXTRUDER_AUTO_FAN_TEMPERATURE 50
 #define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed
 
@@ -472,6 +473,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #define THERMISTORHEATER_2 TEMP_SENSOR_2
   #define HEATER_2_USES_THERMISTOR
 #endif
+#if TEMP_SENSOR_3 > 0
+  #define THERMISTORHEATER_3 TEMP_SENSOR_3
+  #define HEATER_3_USES_THERMISTOR
+#endif
 #if TEMP_SENSOR_BED > 0
   #define THERMISTORBED TEMP_SENSOR_BED
   #define BED_USES_THERMISTOR
@@ -485,6 +490,9 @@ const unsigned int dropsegments=5; //everything with less than this number of st
 #if TEMP_SENSOR_2 == -1
   #define HEATER_2_USES_AD595
 #endif
+#if TEMP_SENSOR_3 == -1
+  #define HEATER_3_USES_AD595
+#endif
 #if TEMP_SENSOR_BED == -1
   #define BED_USES_AD595
 #endif
@@ -503,6 +511,10 @@ const unsigned int dropsegments=5; //everything with less than this number of st
   #undef HEATER_2_MINTEMP
   #undef HEATER_2_MAXTEMP
 #endif
+#if TEMP_SENSOR_3 == 0
+  #undef HEATER_3_MINTEMP
+  #undef HEATER_3_MAXTEMP
+#endif
 #if TEMP_SENSOR_BED == 0
   #undef BED_MINTEMP
   #undef BED_MAXTEMP
diff --git a/Marlin/planner.cpp b/Marlin/planner.cpp
index 82702286b..cee1981bc 100644
--- a/Marlin/planner.cpp
+++ b/Marlin/planner.cpp
@@ -629,13 +629,21 @@ block->steps_y = labs((target[X_AXIS]-position[X_AXIS]) - (target[Y_AXIS]-positi
     block->direction_bits |= (1<<Y_AXIS); 
   }
 #else
+  if (target[X_AXIS] < position[X_AXIS])
+  {
+    block->direction_bits |= (1<<X_HEAD); //AlexBorro: Save the real Extruder (head) direction in X Axis
+  }
+  if (target[Y_AXIS] < position[Y_AXIS])
+  {
+    block->direction_bits |= (1<<Y_HEAD); //AlexBorro: Save the real Extruder (head) direction in Y Axis
+  }
   if ((target[X_AXIS]-position[X_AXIS]) + (target[Y_AXIS]-position[Y_AXIS]) < 0)
   {
-    block->direction_bits |= (1<<X_AXIS); 
+    block->direction_bits |= (1<<X_AXIS); //AlexBorro: Motor A direction (Incorrectly implemented as X_AXIS)
   }
   if ((target[X_AXIS]-position[X_AXIS]) - (target[Y_AXIS]-position[Y_AXIS]) < 0)
   {
-    block->direction_bits |= (1<<Y_AXIS); 
+    block->direction_bits |= (1<<Y_AXIS); //AlexBorro: Motor B direction (Incorrectly implemented as Y_AXIS)
   }
 #endif
   if (target[Z_AXIS] < position[Z_AXIS])
diff --git a/Marlin/stepper.cpp b/Marlin/stepper.cpp
index 1b831cc8f..fe50e3704 100644
--- a/Marlin/stepper.cpp
+++ b/Marlin/stepper.cpp
@@ -401,10 +401,11 @@ ISR(TIMER1_COMPA_vect)
 
     // Set direction en check limit switches
     #ifndef COREXY
-    if ((out_bits & (1<<X_AXIS)) != 0) {   // stepping along -X axis
+    if ((out_bits & (1<<X_AXIS)) != 0)   // stepping along -X axis
     #else
-    if ((((out_bits & (1<<X_AXIS)) != 0)&&(out_bits & (1<<Y_AXIS)) != 0)) {   //-X occurs for -A and -B
+    if ((out_bits & (1<<X_HEAD)) != 0)   //AlexBorro: Head direction in -X axis for CoreXY bots.
     #endif
+    {
       CHECK_ENDSTOPS
       {
         #ifdef DUAL_X_CARRIAGE
@@ -425,7 +426,8 @@ ISR(TIMER1_COMPA_vect)
         }
       }
     }
-    else { // +direction
+    else 
+    { // +direction
       CHECK_ENDSTOPS
       {
         #ifdef DUAL_X_CARRIAGE
@@ -448,10 +450,11 @@ ISR(TIMER1_COMPA_vect)
     }
 
     #ifndef COREXY
-    if ((out_bits & (1<<Y_AXIS)) != 0) {   // -direction
+    if ((out_bits & (1<<Y_AXIS)) != 0)   // -direction
     #else
-    if ((((out_bits & (1<<X_AXIS)) != 0)&&(out_bits & (1<<Y_AXIS)) == 0)) {   // -Y occurs for -A and +B
+    if ((out_bits & (1<<Y_HEAD)) != 0)  //AlexBorro: Head direction in -Y axis for CoreXY bots.
     #endif
+    {
       CHECK_ENDSTOPS
       {
         #if defined(Y_MIN_PIN) && Y_MIN_PIN > -1
@@ -465,7 +468,8 @@ ISR(TIMER1_COMPA_vect)
         #endif
       }
     }
-    else { // +direction
+    else 
+    { // +direction
       CHECK_ENDSTOPS
       {
         #if defined(Y_MAX_PIN) && Y_MAX_PIN > -1
diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 9889e1fda..d5bd2d63d 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -136,11 +136,11 @@ static volatile bool temp_meas_ready = false;
 
 #ifdef PIDTEMP
 #ifdef PID_PARAMS_PER_EXTRUDER
-  float Kp[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kp, DEFAULT_Kp, DEFAULT_Kp);
-  float Ki[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT);
-  float Kd[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT);
+  float Kp[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kp, DEFAULT_Kp, DEFAULT_Kp, DEFAULT_Kp);
+  float Ki[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT);
+  float Kd[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT);
   #ifdef PID_ADD_EXTRUSION_RATE
-    float Kc[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kc, DEFAULT_Kc, DEFAULT_Kc);
+    float Kc[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kc, DEFAULT_Kc, DEFAULT_Kc, DEFAULT_Kc);
   #endif // PID_ADD_EXTRUSION_RATE
 #else //PID_PARAMS_PER_EXTRUDER
   float Kp = DEFAULT_Kp;
@@ -460,13 +460,15 @@ void checkExtruderAutoFans()
   #endif 
   #if defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1
     if (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN 
+        && EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
         && EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
       setExtruderAutoFanState(EXTRUDER_2_AUTO_FAN_PIN, (fanState & 4) != 0);
   #endif
   #if defined(EXTRUDER_3_AUTO_FAN_PIN) && EXTRUDER_3_AUTO_FAN_PIN > -1
     if (EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN 
-        && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
         && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
+        && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
+        && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_2_AUTO_FAN_PIN)
       setExtruderAutoFanState(EXTRUDER_3_AUTO_FAN_PIN, (fanState & 8) != 0);
   #endif
 }