$fn = 200;

difference() {
    union() {
        rotate_extrude() {
            translate([8, 1, 0])
            circle(d=2);
            
            translate([44, 1, 0])
            circle(d=2);
            
            translate([8, 0, 0])
            square([36, 1]);
        }

        translate([0, 0, 10])
        scale([1, 1, 0.7])
        rotate_extrude() {
            translate([9, 1, 0])
            circle(d=4);

            translate([43, 1, 0])
            circle(d=4);
        }

        translate([0, 0, 1])
        cylinder(h=10, d=90);
    }
    
    cylinder(h=16, d=14);
    
    translate([0, 0, 2])
    rotate_extrude() {
        translate([11, 0, 0])
        square([30, 16]);
    }
}