$fn = 256;
od = 21.5;
id = 15;
h = 2;
ep = 0.01;
recess = 0.8;

tiltAngle = 60;


difference() {
  union() {
    translate([0, 0, (sin(tiltAngle) * od) / 2]) rotate([0, tiltAngle, 0]) union() {
      difference() {
        union() {
          cylinder(d=od, h=h - recess + ep);
          // Top protrustion
          translate([0, 0, h - recess]) cylinder(d1=id + recess*2 + 0.2, d2=id, h=recess);
          //translate([0, 0, h - recess]) cylinder(d=id, h=recess);
        }

        // Bottom cut
        color("red") translate([0, 0, -ep])
          cylinder(d1=id + recess*2 + 0.4, d2=id + 0.4, h=recess);
          //cylinder(d=id + 0.8, h=recess);
      }
    }

    difference() {
      translate([-(cos(tiltAngle) * (id - 2)) / 2 + 0.25, -0.4, 0])
        cube([cos(tiltAngle) * (id - 2), 0.8, sin(tiltAngle) * od]);

      color("blue") union() {
        translate([0, 0, (sin(tiltAngle) * od) / 2])
        rotate([0, tiltAngle, 0])
        translate([-sin(tiltAngle) * od, -0.5, recess - 0.2])
        cube([2 * od, 1, od]);

      }
    }

    translate([0.6, 0, (sin(tiltAngle) * od) / 2 - 1]) rotate([0, tiltAngle, 0])
    union() {
      difference() {
        color("pink") cylinder(d=od, h=h - recess + ep);

        color("blue") translate([-1, 0, -ep])
        union() {
         cylinder(d=od, h=h - recess + 3*ep);
         //translate([-2, (od + 2*ep) / 2, -ep])
         translate([-(od / 2) - 2, -(od + 2*ep) / 2, -ep])
         cube([od, od + 4*ep, h]);
        }
      }
    }

  }

  translate([-od, -od/2, -2]) cube([2 * od, od, 2]);
}