$fn=100;
  difference(){
  translate ([0,0,1.25]) cylinder(h=2.0, r1= 26, r2=29, center=true);
  translate ([0,0,1.25]) cylinder(h=3.0, r1=24.0, r2=21.0, center=true);
  translate ([0,0,1.25]) cylinder(h=3.0, r1=22.0, r2=22.0, center=true);
  }
 
  difference(){
//    translate ([0,0,2.0]) cylinder(h=5, r1=23, r2=24, center=false);
    translate ([0,0,2.0]) cylinder(h=5, r1=23.75, r2=24.75, center=false);
    translate ([0,0,2.0]) cylinder(h=10, r1=22.75, r2=22.75, center=false);
    translate ([2, -30, 2.0]) cube([30, 60, 6]);
    translate ([-32,-30,2.0]) cube([30, 60, 6]);
  }