$fn = 300;

e = 0.02;

difference() {
    union() {
        cylinder(h=15, d=11.6);

        translate([0, 0, 15])
        cylinder(h=15, d=8);
        
        for (r=[0, 180])
        rotate([0, 0, r]) {
            translate([0, 0, 25])
            rotate_extrude(angle=45)
            square([5, 5]);

            translate([0, 0, 23])
            intersection() {
                rotate_extrude(angle=45)
                square([5, 4]);

                cylinder(h=2, d1=8, d2=10);
            }
}
    }
    
    translate([0, 0, -e])
    cylinder(h=(e + 30 + e), d=6.1);
}

intersection() {
    translate([-3, 1, 16])
    rotate([0, 90, 0])
    linear_extrude(height=6)
    polygon([
        [0, 0],
        [2, 2],
        [0, 2],
    ]);
    
    cylinder(h=30, d=8);
}

translate([20, 0, 0]) {
    difference() {
        cylinder(h=20, d=11.6);
        
        translate([0, 0, -e])
        cylinder(h=(15 + e), d=8.2);
        
        cylinder(h=(20 + e), d=3.5);
        
        translate([0, 0, 18.8])
        cylinder(h=(1.3 + e), d=5);
        
        translate([0, 0, 18.5])
        cylinder(h=0.3, d1=3.5, d2=5);
        
        translate([0, 0, -e])
        for (r=[0, 180])
        rotate([0, 0, r]) {
            rotate_extrude(angle=45)
            square([5.05, 15 + e]);
            
            translate([0, 0, 10])
            rotate_extrude(angle=135)
            square([5.05, 5 + e]);
            
            translate([0, 0, 8])
            intersection() {
                rotate_extrude(angle=135)
                square([5.05, 4]);

                cylinder(h=(2+e), d1=8.2, d2=10.1);
            }
        }
    }
    
    for (r=[0, 180])
    rotate([0, 0, r]) {
        rotate([0, 0, 85])
        translate([5.05, 0, 9])
        cylinder(h=7, r=0.2);
    }
}