Brass colour now distinct from gold.

global_defs.scad

@@ -60,7 +60,8 @@ grey60                          = [0.6, 0.6, 0.6];
 grey70                          = [0.7, 0.7, 0.7];
 grey80                          = [0.8, 0.8, 0.8];
 grey90                          = [0.9, 0.9, 0.9];
-brass                           = [255/255, 215/255, 0/255];
+gold                            = [255/255, 215/255, 0/255];
+brass                           = [255/255, 220/255, 100/255];
 silver                          = [0.75, 0.75, 0.75];
 
 /*

readme.md

@@ -2601,7 +2601,7 @@ SK shaft support brackets
 |   1 | ```sk_bracket(SK12)``` |  SK12 shaft support bracket |
 |   1 | ```sk_bracket(SK16)``` |  SK16 shaft support bracket |
 |   1 | ```sk_bracket(SK8)``` |  SK8 shaft support bracket |
-|   2 | ```screw(M4_cap_screw, 16)``` |  Screw M4 cap x 16mm |
+|   2 | ```screw(M4_cap_screw, 12)``` |  Screw M4 cap x 12mm |
 |   6 | ```screw(M5_cap_screw, 16)``` |  Screw M5 cap x 16mm |
 |   2 | ```washer(M4_washer)``` |  Washer  M4 x 9mm x 0.8mm |
 |  10 | ```washer(M5_washer)``` |  Washer  M5 x 10mm x 1mm |

vitamins/sk_bracket.scad

@@ -110,7 +110,8 @@ module sk_bracket_assembly(type, part_thickness = 2, screw_type = M5_cap_screw,
     nut_washer_thickness = nut_washer_type ? washer_thickness(nut_washer_type) : 0;
 
     nut_offset = sk_base_height(type) + part_thickness;
-    screw_length = screw_longer_than(nut_offset + screw_washer_thickness + nut_washer_thickness + nut_thickness(nut_type));
+    screw_length = nut_washer_type ? screw_longer_than(nut_offset + screw_washer_thickness + nut_washer_thickness + nut_thickness(nut_type))
+                                   : screw_shorter_than(nut_offset + screw_washer_thickness + nut_thickness(nut_type) + 2);
 
     sk_bracket_hole_positions(type) {
         screw_and_washer(screw_type, screw_length);