$fn=30;

Delta=0.001;
Open=80;


module clip(D=6, H=5, Dicke=2) {
  difference() {
    union() {
      cylinder(d=D+2*Dicke, h=H);
    }
    translate([Dicke/2,0,-Delta]) cylinder(d=D, h=H+2*Delta);
    translate([0,0,-Delta]) for(j=[-Open/2:360/$fn:+Open/2]) rotate([0,0,j]) hull() {
      rotate([0,0,+360/$fn/2]) cube([60,0.001,H+2*Delta]);
      rotate([0,0,-360/$fn/2]) cube([60,0.001,H+2*Delta]);
    }
  }
}

rotate([0,-90,0]) union() {
  Dicke=1.5;
  translate(v = [5+3+Dicke/2,-6.5,0]) clip(D=5.6, Dicke=Dicke, H=25);
  translate(v = [5+4+Dicke/2,+6.5,0]) clip(D=7.8, Dicke=Dicke, H=25);
  translate([0,-8,0]) cube([5, 16, 25]);
  translate([-2,-10,-10]) difference() {
    cube([3, 20, 45]);
    translate([0,10,40]) rotate([0,90,0]) cylinder(d=4, h=3.1);
    translate([0,10,5]) rotate([0,90,0])  cylinder(d=4, h=3.1);
  }
}