diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index a1598a0aa6..b87da05106 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -219,6 +219,16 @@
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": false
                 },
+                "machine_always_write_active_tool":
+                {
+                    "label": "Always Write Active Tool",
+                    "description": "Write active tool after sending temp commands to inactive tool. Required for Dual Extruder printing with Smoothie or other firmware with modal tool commands.",
+                    "default_value": false,
+                    "type": "bool",
+                    "settable_per_mesh": false,
+                    "settable_per_extruder": false,
+                    "settable_per_meshgroup": false
+                },
                 "machine_center_is_zero":
                 {
                     "label": "Is Center Origin",
diff --git a/resources/definitions/smoothie.def.json b/resources/definitions/smoothie.def.json
new file mode 100644
index 0000000000..a2313487f7
--- /dev/null
+++ b/resources/definitions/smoothie.def.json
@@ -0,0 +1,37 @@
+{
+    "version": 2,
+    "name": "Smoothie Custom Printer",
+    "inherits": "fdmprinter",
+    "metadata": {
+        "visible": true,
+        "author": "grk3010",
+        "manufacturer": "Custom",
+        "file_formats": "text/x-gcode",
+        "machine_extruder_trains":
+        {
+            "0": "custom_extruder_1",
+            "1": "custom_extruder_2",
+            "2": "custom_extruder_3",
+            "3": "custom_extruder_4",
+            "4": "custom_extruder_5",
+            "5": "custom_extruder_6",
+            "6": "custom_extruder_7",
+            "7": "custom_extruder_8"
+        },
+        "first_start_actions": ["MachineSettingsAction"]
+    },
+    "overrides": {
+        "machine_gcode_flavor": {
+            "default_value": "RepRap (Marlin/Sprinter)"
+        },
+        "machine_always_write_active_tool": {
+        	"default_value": true
+        },
+        "machine_start_gcode": {
+            "default_value": "G28 X0 Y0 ; Home X Y\nM375; Load Bed Leveling Grid\nG1 X300 Y275 F15000 ; Move to bed center\nM280 S3.0 ; Deploy probe pin\n## NOTE: Adjust \"ZX.XX\" after G30 to be the Z-offset (in mm) between the probe and the nozzle\n## This is how you adjust nozzle printing height!\nG30 Z1.25 ; Move down to find bed & set Z home offset\nM280 S7.0 ; Retract probe\nG1 Z15.0 F600 ; move extruder up 15mm\nT0; Activate Extruder 1"
+        },
+        "machine_end_gcode": {
+            "default_value": "G28 X0 Y0; Home X and Y\nM104 S0 ; turn off extruder\nM140 S0 ; turn off bed\nM107; turn off fans\nM84 ; disable motors"
+        }
+    }
+}