diff --git a/resources/definitions/hms434.def.json b/resources/definitions/hms434.def.json
index d340a81a37..65322277cc 100644
--- a/resources/definitions/hms434.def.json
+++ b/resources/definitions/hms434.def.json
@@ -15,7 +15,7 @@
 
         "has_variants":           true,
         "variants_name":          "Tool",
-        "preferred_variant_name": "0.8mm TP extruder",
+        "preferred_variant_name": "0.4mm TP extruder",
 
         "has_machine_quality":    true,
         "preferred_quality_type": "normal",
@@ -39,11 +39,11 @@
     },
 
     "overrides": {
-        "machine_extruder_count":     {"default_value": 1 },
+        "machine_extruder_count":     {"default_value": 2 },
         "material_diameter":          {"default_value": 1.75 },
         "machine_heated_bed":         {"default_value": true },
         "machine_center_is_zero":     {"default_value": false },
-        "gantry_height":              {"default_value": 35 },
+        "gantry_height":              {"value": 35 },
         "machine_height":             {"default_value": 400 },
         "machine_depth":              {"default_value": 325 },
         "machine_width":              {"default_value": 450 },
@@ -57,7 +57,7 @@
         "prime_tower_position_y":     {"value": 70 },
         "prime_blob_enable":          {"default_value": false },
         "machine_max_feedrate_z":     {"default_value": 1200 },
-        "machine_start_gcode":        {"default_value": "\n;Neither HMS434 nor any of HMS434 Subsidiaries has any liabilities or gives any warrenties on this .gcode file,\n\n;or on any or all objects made with this .gcode file \nM117 Homing Y ......\nG28 Y\nM117 Homing X ......\nG28 X\nM117 Homing Z ......\nG28 Z F100\nG1 Z10 F600\n\nG1 X-71 F9000;go to wipe point\nG1 Y-100 F9000\nG1 Z0 F900\n\nG1 Z0.2 F900\n\nG1 Y-65 F12000\nG1 X50 Y0 F9000\nM117 HMS434 Printing ...\n\n" },
+        "machine_start_gcode":        {"default_value": "\n;Neither MaukCC nor any of MaukCC representatives has any liabilities or gives any warranties on this .gcode file, or on any or all objects made with this .gcode file. \nM117 Homing Y ......\nG28 Y\nM117 Homing X ......\nG28 X\nM117 Homing Z ......\nG28 Z F100\nG1 Z10 F600\n\nG1 X-71 F9000;go to wipe point\nG1 Y-100 F9000\nG1 Z0 F900\n\nG1 Z0.2 F900\n\nG1 Y-65 F12000\nG1 X50 Y0 F9000\nM117 HMS434 Printing ...\n\n" },
         "machine_end_gcode":          {"default_value": "" },
 
 
@@ -130,7 +130,7 @@
         "cool_fan_enabled":                  {"value": true},
         "cool_min_layer_time_fan_speed_max": {"value": "cool_min_layer_time"},
         "cool_min_layer_time":               {"value": 20},
-        "cool_min_speed":                    {"value": "speed_wall_x"},
+        "cool_min_speed":                    {"value": "10"},
         "cool_lift_head":                    {"value": false},
 
         "support_z_distance":        {"value": 0},
@@ -144,6 +144,8 @@
         "skirt_gap":                 {"value": 1},
         "skirt_brim_minimal_length": {"value": 50},
 
+        "prime_tower_enable":        {"value": false},
+
         "coasting_enable":               {"value": true},
         "coasting_volume":               {"value": 0.1},
         "coasting_min_volume":           {"value": 0.17},
diff --git a/resources/extruders/hms434_tool_2.def.json b/resources/extruders/hms434_tool_2.def.json
index f5ed69533d..c581d0b035 100644
--- a/resources/extruders/hms434_tool_2.def.json
+++ b/resources/extruders/hms434_tool_2.def.json
@@ -13,7 +13,7 @@
             "default_value": 1,
             "maximum_value": "8"
         },
-        "machine_nozzle_offset_x": { "default_value": 20.0 },
+        "machine_nozzle_offset_x": { "default_value": 0.0 },
         "machine_nozzle_offset_y": { "default_value": 0.0 },
         "material_diameter": { "default_value": 1.75 },
         "machine_extruder_start_code": {