diff --git a/resources/definitions/hms434.def.json b/resources/definitions/hms434.def.json
index 5a1b5b2671..b2dbce3f13 100644
--- a/resources/definitions/hms434.def.json
+++ b/resources/definitions/hms434.def.json
@@ -69,7 +69,7 @@
         "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-30 Y100 F12000\n\nM190 S{material_bed_temperature_layer_0}\nM117 HMS434 Printing ...\n\n" },
+        "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-30 Y100 F12000\n\nM190 S{material_bed_temperature_layer_0}\nM117 HMS434 Printing ...\n\nM42 P10 S255 ; chamberfans on" },
         "machine_end_gcode":          {"default_value": "" },
 
         "retraction_extra_prime_amount":      {"minimum_value_warning": "-2.0" },
@@ -100,7 +100,6 @@
         "z_seam_y":                  {"value": "325"},
         "z_seam_corner":             {"value": "'z_seam_corner_inner'"},
         "skin_outline_count":        {"value": "0"},
-        "ironing_enabled":           {"value": true },
         "ironing_line_spacing":      {"value": "line_width / 4 * 3"},
         "ironing_flow":              {"value": "0"},
         "ironing_inset":             {"value": "ironing_line_spacing"},
@@ -108,9 +107,6 @@
  
         "infill_sparse_density": {"value": 30},
         "infill_pattern":        {"value": "'lines'"},
-        "infill_overlap":        {"value": 5},
-        "skin_overlap":          {"value": 5},
-        "infill_wipe_dist":      {"value": 0.0},
         "infill_before_walls":   {"value": false},
 
         "material_print_temperature_layer_0": {"value": "material_print_temperature"},
@@ -118,15 +114,10 @@
                                                "maximum_value_warning": "material_print_temperature + 15"},
         "material_final_print_temperature":   {"value": "material_print_temperature"},
         "material_bed_temperature_layer_0":   {"value": "material_bed_temperature"},
-        "material_flow":                      {"value": "100"},
         "material_flow_layer_0":              {"value": "material_flow"},
         "retraction_enable":                  {"value": true },
         "retract_at_layer_change":            {"value": true },
-        "retraction_amount":                  {"value": "1"},
-        "retraction_speed":                   {"value": "20"},
-        "retraction_prime_speed":             {"value": "8"},
         "retraction_min_travel":              {"value": "(round(line_width * 10))"},
-        "switch_extruder_retraction_amount":  {"value": 2},
         "switch_extruder_retraction_speeds":  {"value": "(retraction_speed)"},
         "switch_extruder_prime_speed":        {"value": "(retraction_prime_speed)"},
 
diff --git a/resources/extruders/hms434_tool_1.def.json b/resources/extruders/hms434_tool_1.def.json
index 4e56612d09..619d286716 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}\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 Y120 F3000\nG1 X10 F12000\nG1 E-{switch_extruder_retraction_amount} F2400\n\n"
+          "default_value": "\n;changing to tool1\nM83\nM109 T0 S{material_print_temperature}\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 Y120 F3000\nG1 X10 F12000\n\n"
         },
         "machine_extruder_end_code": {
            "default_value": "\nG1 X10 Y120 F12000\nG1 X-40 F12000\nM109 T0 R{material_standby_temperature}\nG1 Y100 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 9cfda142a2..20e940df3b 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}\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 E{switch_extruder_extra_prime_amount} F360\nG1 Y120 F3000\nG1 X10 F12000\nG1 E-{switch_extruder_retraction_amount} F2400\n\n"
+          "default_value": "\n;changing to tool2\nM83\nM109 T1 S{material_print_temperature}\nG1 E{switch_retraction_prime_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 Y120 F3000\nG1 X10 F12000\n\n"
         },
         "machine_extruder_end_code": {
            "default_value": "\nG1 X10 Y120 F12000\nG1 X-40 F12000\nM109 T1 R{material_standby_temperature}\nG1 Y100 F3000\n; ending tool2\n\n"