// ECHO: "max_radius=", 13.6
// ECHO: "total_height=", 28.9

// clearance radius = 4 + 13.6 = 17.6
// clearance diameter = 17.6 * 2 = 35.2

// 2020 width is 50.8

// linear bearing od=15, l=24

// 15 + 15 + 35.2 = 65.2 === can't go side-by-side

$fn = 500;

difference() {
    color("red", 0.7)
    hull() {
        for(y=[6, 44.8], z=[6, 34.5]) {
            translate([0, y, z])
            rotate([0, 90, 0])
            cylinder(h=54, r=6);
        }
    }
    
    for (y=[9.4, 41.4]) {
        translate([-1, y, 9])
        rotate([0, 90, 0])
        cylinder(h=60, d=13);
    }
    
    for (x=[2, 28], y=[9.4, 41.4]) {
        translate([x, y, 9])
        rotate([0, 90, 0])
        cylinder(h=24, d=15);
    }
    
    translate([12, (50.8 / 2), 34])
    rotate([0, 90, 0])
    cylinder(h=30, r=20);
    
    translate([2, (50.8 / 2), 34])
    rotate([0, 90, 0])
    cylinder(h=50, d=8);
}