Change support Z offset to 2*layer_height

The materials team found this to work better.

resources/quality/ultimaker2_plus/um2p_nylon_0.25_high.inst.cfg

@@ -38,7 +38,7 @@ support_enable = True
 support_infill_rate = 20
 support_pattern = lines
 support_xy_distance = 0.6
-support_z_distance = 0.45
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 1.2
 wall_thickness = 1
 

resources/quality/ultimaker2_plus/um2p_nylon_0.25_normal.inst.cfg

@@ -38,7 +38,7 @@ support_enable = True
 support_infill_rate = 20
 support_pattern = lines
 support_xy_distance = 0.6
-support_z_distance = 0.45
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 1.2
 wall_thickness = 1
 

resources/quality/ultimaker2_plus/um2p_nylon_0.4_fast.inst.cfg

@@ -37,7 +37,7 @@ support_enable = True
 support_infill_rate = 25
 support_pattern = lines
 support_xy_distance = 0.6
-support_z_distance = 0.45
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 0.75
 wall_thickness = 1.06
 

resources/quality/ultimaker2_plus/um2p_nylon_0.4_normal.inst.cfg

@@ -36,7 +36,7 @@ support_enable = True
 support_infill_rate = 25
 support_pattern = lines
 support_xy_distance = 0.6
-support_z_distance = 0.45
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 0.75
 wall_thickness = 1.06
 

resources/quality/ultimaker2_plus/um2p_nylon_0.6_fast.inst.cfg

@@ -42,6 +42,7 @@ support_infill_rate = 25
 support_pattern = lines
 support_top_distance = 0.55
 support_xy_distance = 0.7
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 1.2
 wall_thickness = 1.2
 

resources/quality/ultimaker2_plus/um2p_nylon_0.6_normal.inst.cfg

@@ -40,7 +40,7 @@ support_enable = True
 support_infill_rate = 25
 support_pattern = lines
 support_xy_distance = 0.7
-support_z_distance = 0.55
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 1.2
 wall_thickness = 1.2
 

resources/quality/ultimaker2_plus/um2p_nylon_0.8_draft.inst.cfg

@@ -41,7 +41,7 @@ support_infill_rate = 25
 support_pattern = lines
 support_top_distance = 0.5
 support_xy_distance = 0.75
-support_z_distance = 0.5
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 1.2
 wall_thickness = 2.4
 

resources/quality/ultimaker2_plus/um2p_nylon_0.8_normal.inst.cfg

@@ -41,7 +41,7 @@ support_infill_rate = 25
 support_pattern = lines
 support_top_distance = 0.5
 support_xy_distance = 0.75
-support_z_distance = 0.5
+support_z_distance = =layer_height * 2
 top_bottom_thickness = 1.2
 wall_thickness = 2.4