poses = [
    [-20, -20, -15],
    [-20, 20, 15],
    [20, -20, -45],
    [20, 20, 45],
];

for (pos = poses)
translate([pos[0], pos[1], 0])
rotate([0, 0, pos[2]]) {
    difference() {
        union() {
            difference() {
                cylinder(h=15, d1=25, d2=27, $fn=100);
                
                translate([0, 0, 2])
                cylinder(h=13.01, d1=21, d2=23.5, $fn=100);
                
                translate([0, 0, -0.01])
                difference() {
                    cylinder(h=1.01, d=26, $fn=100);
                
                    translate([0, 0, -0.01])
                    cylinder(h=1.01, d=23, $fn=100);
                }
            }
            
            translate([0, 0, 1.0])
            torus(r_major=11.5, r_minor=1.0, xs=1.06, $fn=100);
        }
        
        for (a = [0, 120, 240])
        rotate([0, 0, a]) {
            translate([10, 0, 5])
            cube([8, 4, 10.01], center=true);
            
            translate([11, 0, 10])
            rotate([0, 90, 0])
            cylinder(h=6, d=4, center=true, $fn=100);
        }
    }
    
    translate([0, 0, 15])
    torus(r_major=12.625, r_minor=0.875, $fn=100);
}

difference() {
    union() {
        cylinder(h=10, d1=42, d2=44, $fn=100);
        
        translate([0, 0, 10.1])
        torus(r_major=18.5, r_minor=2, xs=1.75, $fn=100);
    }
    
    translate([0, 0, 5])
    cylinder(h=5.01, d=24, $fn=100);
        
    translate([0, 0, 10])
    torus(r_major=12, r_minor=3, ys=1.66, $fn=100);
    
    for (pos = poses)
    translate([pos[0], pos[1], 0])
    rotate([0, 0, pos[2]]) {
        translate([0, 0, 2])
        cylinder(h=13.01, d1=21, d2=23.5, $fn=100);
    }
    
    translate([0, 0, -0.01])
    difference() {
        cylinder(h=1.01, d=43, $fn=100);
    
        translate([0, 0, -0.01])
        cylinder(h=1.01, d=40, $fn=100);
    }
}

translate([0, 0, 1.0])
torus(r_major=20, r_minor=1.0, xs=1.1, $fn=100);

module torus(r_major, r_minor, xs=1.0, ys=1.0) {
    rotate_extrude()
    translate([r_major, 0, 0])
    scale([xs, ys, 1.0])
    circle(r=r_minor);
}