comb_depth = 30;
sloth_depth = 5;

thickness_start = 2.3;
thickness_step = .05;

slot_step = 10;
slots = 10;

difference() {
  square([slot_step * (slots + 1), comb_depth]);

  for (i = [0:slots]) {
    thickness = thickness_start + thickness_step * i;
    translate([slot_step / 3 + slot_step * i, 0, 0]) {
      square([thickness, sloth_depth]);

      // thickness label
      translate([0, comb_depth * .75, 0]) text(str(thickness), size = 2);

      // chamfer
      ct = thickness * 1.5;
      x = sqrt(pow(ct, 2) + pow(ct, 2));
      translate([thickness / 2, x / -2, 0]) rotate(45) square([ct, ct]);
    }
  }
}