10 hole_from_back = 7.2 + 0.5;
12 bolthead_dia = 7 + 1.0;
15 plasfix_dia = 4.5 + 0.5;
16 plasfix_head = plasfix_dia * 2;
17 plasfix_headdep = plasfix_dia;
20 height = light_height + backspc + extra_height;
22 octagon_fudge = 1/cos(22.5);
26 translate([-len/2, 0, 0])
27 cube([len, width, height]);
28 translate([0, width/2, 0]) {
29 cylinder(r= plasfix_dia/2, h=50, $fn=20);
31 cylinder(r= plasfix_dia/2, h= plasfix_headdep + plasfix_sink, $fn=20);
33 cylinder(r= plasfix_head/2, h= plasfix_sink + 1, $fn=20);
37 translate([xsgn * holespc/2, -1,
38 light_height - hole_from_back + extra_height]) {
40 rotate([0,0,360/8/2]) {
41 cylinder(r=bolthead_dia/2 * octagon_fudge,
42 h= bolthead_depth +1, $fn=8);
43 cylinder(r=hole_dia/2 * octagon_fudge,