translate([0,0,10])
rotate([180,0,0])
difference(){
translate([0,0,5])
rotate([180,0,0])
difference(){
cube([33.6,19.6,10],center=true);
translate([0,0,0.6])
cube([32,18,9],center=true);
}
translate([0,0,1.5])
rotate([0,90,0])
cylinder(h=35, d=4, $fn=40, center=true);
}

translate([36,0,-6.5+1.5+2])
difference(){
intersection(){
union(){
cube([33.6,19.6,10],center=true);
translate([0,0,2])
cube([32,18,9],center=true);
}
translate([0,0,6])
cube([34,20,6],center=true);
}
translate([0,0,6.5])
rotate([0,90,0])
cylinder(h=35, d=4, $fn=40, center=true);

}