$fn = 100;

difference() {
    union() {
        translate(v=[0, 0, 2.5]) {
            cylinder(h=5, d=61, center=true);
        }
        translate(v=[30.5, 0, 2.5]) {
            cylinder(h=5, d=12, center=true);
        }
        translate(v=[-30.5, 0, 2.5]) {
            cylinder(h=5, d=12, center=true);
        }
        translate(v=[0, 0, 40]) {
            cylinder(h=80, d=53, center=true);
        }
    }
    union() {
        translate(v=[0, 0, 45]) {
            cylinder(h=100, d=47, center=true);
        }
        translate(v=[31, 0, 2.5]) {
            cylinder(h=6, d=4, center=true);
        }
        translate(v=[-31, 0, 2.5]) {
            cylinder(h=6, d=4, center=true);
        }
        translate(v=[31, 0, 4.01]) {
            cylinder(h=2, d1=4, d2=7, center=true);
        }
        translate(v=[-31, 0, 4.01]) {
            cylinder(h=2, d1=4, d2=7, center=true);
        }
        translate(v=[0, -90, 86]) {
            sphere(r=100);
        }
    }
}