diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 1a91bbea9c..74a8545fdd 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -2333,7 +2333,7 @@
                     "type": "float",
                     "minimum_value": "0",
                     "maximum_value_warning": "10",
-                    "default_value": 0.15,
+                    "default_value": 0.1,
                     "global_inherits_stack": "support_extruder_nr",
                     "enabled": "support_enable",
                     "settable_per_mesh": true,
@@ -2346,7 +2346,7 @@
                             "unit": "mm",
                             "minimum_value": "0",
                             "maximum_value_warning": "10",
-                            "default_value": 0.15,
+                            "default_value": 0.1,
                             "type": "float",
                             "enabled": "support_enable",
                             "value": "extruderValue(support_extruder_nr, 'support_z_distance')",
@@ -2361,7 +2361,7 @@
                             "minimum_value": "0",
                             "maximum_value_warning": "10",
                             "default_value": 0.1,
-                            "value": "0.1 if support_type == 'everywhere' else 0",
+                            "value": "extruderValue(support_extruder_nr, 'support_z_distance') if support_type == 'everywhere' else 0",
                             "global_inherits_stack": "support_extruder_nr",
                             "type": "float",
                             "enabled": "support_enable and support_type == 'everywhere'",
@@ -3161,6 +3161,7 @@
                     "description": "The extruder train to use for printing the skirt/brim/raft. This is used in multi-extrusion.",
                     "type": "extruder",
                     "default_value": "0",
+                    "enabled": "machine_extruder_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false
                 },
@@ -3170,7 +3171,7 @@
                     "description": "The extruder train to use for printing the support. This is used in multi-extrusion.",
                     "type": "extruder",
                     "default_value": "0",
-                    "enabled": "support_enable",
+                    "enabled": "support_enable and machine_extruder_count > 1",
                     "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "children": {
@@ -3181,7 +3182,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "support_enable",
+                            "enabled": "support_enable and machine_extruder_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -3192,7 +3193,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "support_enable",
+                            "enabled": "support_enable and machine_extruder_count > 1",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         },
@@ -3203,7 +3204,7 @@
                             "type": "extruder",
                             "default_value": "0",
                             "value": "support_extruder_nr",
-                            "enabled": "support_enable and extruderValue(support_extruder_nr, 'support_interface_enable')",
+                            "enabled": "support_enable and machine_extruder_count > 1 and extruderValue(support_extruder_nr, 'support_interface_enable')",
                             "settable_per_mesh": false,
                             "settable_per_extruder": false
                         }