diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index f3f0ce2923..d85050f824 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -1351,7 +1351,7 @@ class CuraApplication(QtApplication):
         try:
             group_node = Selection.getAllSelectedObjects()[0]
         except Exception as e:
-            Logger.log("d", "mergeSelected: Exception: %s", e)
+            Logger.log("e", "mergeSelected: Exception: %s", e)
             return
 
         meshes = [node.getMeshData() for node in group_node.getAllChildren() if node.getMeshData()]
diff --git a/resources/definitions/deltacomb.def.json b/resources/definitions/deltacomb.def.json
index 7e6e956dbc..0fdf61e582 100644
--- a/resources/definitions/deltacomb.def.json
+++ b/resources/definitions/deltacomb.def.json
@@ -14,7 +14,7 @@
     },
 
     "overrides": {
-        "machine_heated_bed":                    { "default_value": false },
+        "machine_heated_bed":                    { "default_value": true },
         "machine_width":                         { "default_value": 190 },
         "machine_height":                        { "default_value": 250 },
         "machine_depth":                         { "default_value": 190 },
@@ -25,41 +25,32 @@
         "machine_start_gcode":                   { "default_value": "G21 ;metric values\nG90 ;absolute positioning\nM82 ;set extruder to absolute mode\nM107 ;start with the fan off\nG28 ;Home all axes (max endstops)\nG1 Z15.0 F9000 ;move the platform down 15mm\nG92 E0 ;zero the extruded length\nG1 F200 E3 ;extrude 3mm of feed stock\nG92 E0 ;zero the extruded length again\nG1 F9000\n;Put printing message on LCD screen\nM117 Printing..."},
         "machine_end_gcode":                     { "default_value": "M104 S0 ;extruder heater off\nM140 S0 ;heated bed heater off (if you have it)\nG91 ;relative positioning\nG1 E-1 F300  ;retract the filament a bit before lifting the nozzle, to release some of the pressure\nG28 ;Home all axes (max endstops)\nM84 ;steppers off\nG90 ;absolute positioning" },
         "machine_shape":                         { "default_value": "elliptic" },
-        "machine_max_feedrate_x":                { "default_value": 250 },
-        "machine_max_feedrate_y":                { "default_value": 250 },
-        "machine_max_feedrate_z":                { "default_value": 15 },
-        "machine_max_acceleration_x":            { "default_value": 10000 },
-        "machine_max_acceleration_y":            { "default_value": 10000 },
-        "machine_max_acceleration_z":            { "default_value": 50 },
-        "machine_max_acceleration_e":            { "default_value": 100 },
-        "machine_acceleration":                  { "default_value": 4000 },
-        "machine_max_jerk_xy":                   { "default_value": 25.0 },
-        "machine_max_jerk_z":                    { "default_value": 0.4 },
-        "machine_max_jerk_e":                    { "default_value": 1.0 },
-        "retraction_hop_enabled":                { "default_value": false },
-        "retraction_amount" :                    { "default_value": 4.5 },
-        "retraction_speed" :                     { "default_value": 40 },
+        "retraction_hop_enabled":                { "default_value": true },
+        "retraction_amount" :                    { "default_value": 3.5 },
+        "retraction_speed" :                     { "default_value": 50 },
         "material_diameter":                     { "default_value": 1.75 },
         "material_final_print_temperature":      { "value": "material_print_temperature - 5" },
         "material_initial_print_temperature":    { "value": "material_print_temperature" },
         "material_print_temperature_layer_0":    { "value": "material_print_temperature + 5" },
-        "travel_avoid_distance":                 { "default_value": 1, "value": 1 },
-        "speed_print" :                          { "default_value": 70 },
-        "speed_travel":                          { "default_value": 80, "value": 80 },
+        "travel_avoid_distance":                 { "default_value": 1, "value": "1" },
+        "speed_print" :                          { "default_value": 60 },
+        "speed_travel":                          { "value": "150.0" },
         "speed_infill":                          { "value": "round(speed_print * 1.05, 0)" },
         "speed_topbottom":                       { "value": "round(speed_print * 0.95, 0)" },
         "speed_wall":                            { "value": "speed_print" },
-        "speed_wall_0":                          { "value": "round(speed_print * 0.9, 0)" },
+        "speed_wall_0":                          { "value": "20" },
         "speed_wall_x":                          { "value": "speed_wall" },
         "speed_layer_0":                         { "value": "min(round(speed_print * 0.75, 0), 45.0)" },
         "speed_travel_layer_0":                  { "value": "round(speed_travel * 0.7, 0)" },
         "skirt_brim_speed":                      { "value": "speed_layer_0" },
         "skirt_line_count":                      { "default_value": 3 },
         "skirt_brim_minimal_length":             { "default_value": 150 },
-        "infill_sparse_density":                 { "default_value": 24 },
-        "top_bottom_thickness":                  { "default_value": 0.6 },
-        "support_z_distance":                    { "default_value": 0.2, "value": "min(2 * layer_height, machine_nozzle_size * 0.75)" },
+        "infill_sparse_density":                 { "default_value": 90 },
+        "gradual_infill_steps":                  { "default_value": 2 },
         "infill_before_walls" :                  { "default_value": false },
+        "top_bottom_thickness":                  { "default_value": 0.6 },
+        "support_z_distance":                    { "value": "layer_height * 2" },
+        "support_bottom_distance":               { "value": "layer_height" },
         "support_use_towers" :                   { "default_value": false }
     }
 }