5 hex_across = 12.70 - 0.3;
13 total_th = min_th + extra_th;
14 hex_rad = hex_across / 2 / cos(30);
18 circle(r = hex_rad, $fn = 6);
19 circle(r = screw_dia/2);
24 square([ hex_across*2, min_th*2 ], center=true);
28 translate([ hex_rad, 0 ])
36 linextr(0, total_th + 1)
38 linextr_y_xz(-hex_across, hex_across)