diff --git a/Marlin/example_configurations/K8400/Configuration.h b/Marlin/example_configurations/K8400/Configuration.h
index 316a2c0781..8be33d78d0 100644
--- a/Marlin/example_configurations/K8400/Configuration.h
+++ b/Marlin/example_configurations/K8400/Configuration.h
@@ -152,6 +152,30 @@
 // For Cyclops or any "multi-extruder" that shares a single nozzle.
 //#define SINGLENOZZLE
 
+// A dual extruder that uses a single stepper motor
+// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
+//#define SWITCHING_EXTRUDER
+#if ENABLED(SWITCHING_EXTRUDER)
+  #define SWITCHING_EXTRUDER_SERVO_NR 0
+  #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+/**
+ * "Mixing Extruder"
+ *   - Adds a new code, M165, to set the current mix factors.
+ *   - Extends the stepping routines to move multiple steppers in proportion to the mix.
+ *   - Optional support for Repetier Host M163, M164, and virtual extruder.
+ *   - This implementation supports only a single extruder.
+ *   - Enable DIRECT_MIXING_IN_G1 for Pia Taubert's reference implementation
+ */
+//#define MIXING_EXTRUDER
+#if ENABLED(MIXING_EXTRUDER)
+  #define MIXING_STEPPERS 2        // Number of steppers in your mixing extruder
+  #define MIXING_VIRTUAL_TOOLS 16  // Use the Virtual Tool method with M163 and M164
+  //#define DIRECT_MIXING_IN_G1    // Allow ABCDHI mix factors in G1 movement commands
+#endif
+
 // Offset of the extruders (uncomment if using more than one and relying on firmware to position when changing).
 // The offset has to be X=0, Y=0 for the extruder 0 hotend (default extruder).
 // For the other hotends it is their distance from the extruder 0 hotend.
@@ -162,7 +186,6 @@
 // 1 = ATX
 // 2 = X-Box 360 203Watts (the blue wire connected to PS_ON and the red wire to VCC)
 // :{1:'ATX',2:'X-Box 360'}
-
 #define POWER_SUPPLY 1
 
 // Define this to have the electronics keep the power supply off on startup. If you don't know what this is leave it.
diff --git a/Marlin/example_configurations/K8400/Dual-head/Configuration.h b/Marlin/example_configurations/K8400/Dual-head/Configuration.h
index 4024761c8e..158f6add16 100644
--- a/Marlin/example_configurations/K8400/Dual-head/Configuration.h
+++ b/Marlin/example_configurations/K8400/Dual-head/Configuration.h
@@ -152,6 +152,30 @@
 // For Cyclops or any "multi-extruder" that shares a single nozzle.
 //#define SINGLENOZZLE
 
+// A dual extruder that uses a single stepper motor
+// Don't forget to set SSDE_SERVO_ANGLES and HOTEND_OFFSET_X/Y/Z
+//#define SWITCHING_EXTRUDER
+#if ENABLED(SWITCHING_EXTRUDER)
+  #define SWITCHING_EXTRUDER_SERVO_NR 0
+  #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1
+  //#define HOTEND_OFFSET_Z {0.0, 0.0}
+#endif
+
+/**
+ * "Mixing Extruder"
+ *   - Adds a new code, M165, to set the current mix factors.
+ *   - Extends the stepping routines to move multiple steppers in proportion to the mix.
+ *   - Optional support for Repetier Host M163, M164, and virtual extruder.
+ *   - This implementation supports only a single extruder.
+ *   - Enable DIRECT_MIXING_IN_G1 for Pia Taubert's reference implementation
+ */
+//#define MIXING_EXTRUDER
+#if ENABLED(MIXING_EXTRUDER)
+  #define MIXING_STEPPERS 2        // Number of steppers in your mixing extruder
+  #define MIXING_VIRTUAL_TOOLS 16  // Use the Virtual Tool method with M163 and M164
+  //#define DIRECT_MIXING_IN_G1    // Allow ABCDHI mix factors in G1 movement commands
+#endif
+
 // Offset of the extruders (uncomment if using more than one and relying on firmware to position when changing).
 // The offset has to be X=0, Y=0 for the extruder 0 hotend (default extruder).
 // For the other hotends it is their distance from the extruder 0 hotend.
@@ -162,7 +186,6 @@
 // 1 = ATX
 // 2 = X-Box 360 203Watts (the blue wire connected to PS_ON and the red wire to VCC)
 // :{1:'ATX',2:'X-Box 360'}
-
 #define POWER_SUPPLY 1
 
 // Define this to have the electronics keep the power supply off on startup. If you don't know what this is leave it.