Pen stand designed in openjscad

PenStand

// Title: E-cig Pen Stand
// Author: Jim Wygralak
// Date: Dec 17, 2014
// License: Attribution-NonCommercial-ShareAlike 4.0 International
// http://creativecommons.org/licenses/by-nc-sa/4.0/

var inch = 25.4;
var h = 0.125 * inch; // material thickness
var pdia = 5/8*inch;  // pen diameter

function main() {

    pen = cylinder({r: (pdia/2), h: (6 * inch)});
    
    cradle = union(
        difference(
            cylinder({r:inch/2, h: h, center: [true, true, false]}),
            cube([inch,inch/2,h]).translate([-inch/2, -inch/2,0]),
            cylinder({r: pdia/2, h: h})
        ),
        cylinder({r: 3/16*inch/2, h: h}).translate([inch/2-3/16*inch/2,0,0]),
        cylinder({r: 3/16*inch/2, h: h}).translate([-(inch/2-3/16*inch/2),0,0])
    );
    
    shelf = difference(
        cylinder({r: inch/2, h: 2*h, center: [true, true, false]}),
        cylinder({r: pdia/2, h: h, center: [true, true, false]}).translate([0,0,h])
    );
    
    spine = cube([h, inch/2, 3.5 * inch + 2*h]).translate([-h/2, 0.5* inch,-h]);
    
    return [
//        pen,
        cradle.translate([0,0,inch]),
        cradle.translate([0,0,2.25*inch]),
        cradle.translate([0,0,3.5*inch]),
        shelf.translate([0,0,-h]),
        spine
    ];
}