diff --git a/resources/definitions/hms434.def.json b/resources/definitions/hms434.def.json
index d686b5b0d0..5b71822a2a 100644
--- a/resources/definitions/hms434.def.json
+++ b/resources/definitions/hms434.def.json
@@ -70,7 +70,7 @@
         "material_bed_temp_wait":     {"default_value": false },
         "machine_max_feedrate_z":     {"default_value": 10 },
         "machine_acceleration":       {"default_value": 180 },
-        "machine_start_gcode":        {"default_value": "\n;Neither Hybrid AM Systems nor any of Hybrid AM Systems representatives has any liabilities or gives any warranties on this .gcode file, or on any or all objects made with this .gcode file.\n\nM140 S{material_bed_temperature_layer_0}\n\nM117 Homing Y ......\nG28 Y\nM117 Homing X ......\nG28 X\nM117 Homing Z ......\nG28 Z F100\n\nG1 Z10 F900\nG1 X-25 Y20 F12000\n\nM141 S{build_volume_temperature}\nM118 set chamberfan\nM190 S{material_bed_temperature_layer_0}\n\nM118 set pid\n\nM117 HMS434 Printing ..." },
+        "machine_start_gcode":        {"default_value": "\n;Neither Hybrid AM Systems nor any of Hybrid AM Systems representatives has any liabilities or gives any warranties on this .gcode file, or on any or all objects made with this .gcode file.\n\nM140 S{material_bed_temperature_layer_0}\n\nM117 Homing Y ......\nG28 Y\nM117 Homing X ......\nG28 X\nM117 Homing Z ......\nG28 Z F100\n\nG1 Z10 F900\nG1 X-25 Y20 F12000\n\nM141 S{build_volume_temperature}\nM118 // action:set_chamber_fan\nM190 S{material_bed_temperature_layer_0}\n\nM118 // action:set_pid\n\nM117 HMS434 Printing ..." },
         "machine_end_gcode":          {"default_value": "" },
 
         "retraction_extra_prime_amount":      {"minimum_value_warning": "-2.0" },
diff --git a/resources/extruders/hms434_tool_1.def.json b/resources/extruders/hms434_tool_1.def.json
index 9e8a868020..2fecfb1ea1 100644
--- a/resources/extruders/hms434_tool_1.def.json
+++ b/resources/extruders/hms434_tool_1.def.json
@@ -16,7 +16,7 @@
         "machine_nozzle_offset_y": { "default_value": 0.0 },
         "material_diameter": { "default_value": 1.75 },
         "machine_extruder_start_code": {
-          "default_value": "\n;changing to tool1\nM83\nM109 T0 S{material_print_temperature}\nM118 set pid\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E-{switch_extruder_retraction_amount} F2400\nG1 Y40 F3000\nG1 X10 F12000\n\n"
+          "default_value": "\n;changing to tool1\nM83\nM109 T0 S{material_print_temperature}\nM118 // action:set_pid\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E-{switch_extruder_retraction_amount} F2400\nG1 Y40 F3000\nG1 X10 F12000\n\n"
         },
         "machine_extruder_end_code": {
            "default_value": "\nG1 X10 Y40 F12000\nG1 X-25 F12000\nM109 T0 R{material_standby_temperature}\nG1 Y20 F3000\n; ending tool1\n\n"
diff --git a/resources/extruders/hms434_tool_2.def.json b/resources/extruders/hms434_tool_2.def.json
index 48cfca2bba..651905d0c3 100644
--- a/resources/extruders/hms434_tool_2.def.json
+++ b/resources/extruders/hms434_tool_2.def.json
@@ -16,7 +16,7 @@
         "machine_nozzle_offset_y": { "default_value": 0.0 },
         "material_diameter": { "default_value": 1.75 },
         "machine_extruder_start_code": {
-          "default_value": "\n;changing to tool2\nM83\nM109 T1 S{material_print_temperature}\nM118 set pid\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E-{switch_extruder_retraction_amount} F2400\nG1 Y40 F3000\nG1 X10 F12000\n\n"
+          "default_value": "\n;changing to tool2\nM83\nM109 T1 S{material_print_temperature}\nM118 // action:set_pid\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E{switch_extruder_retraction_amount} F300\nG1 E-{switch_extruder_retraction_amount} F2400\nG1 Y40 F3000\nG1 X10 F12000\n\n"
         },
         "machine_extruder_end_code": {
            "default_value": "\nG1 X10 Y40 F12000\nG1 X-25 F12000\nM109 T1 R{material_standby_temperature}\nG1 Y20 F3000\n; ending tool2\n\n"