$fn = 60;

include <BOSL2/std.scad>
include <boltsos_0.4.1/BOLTS.scad>

tube_dia=16;

difference() {
    union() {
        // base
        cuboid([116,116,13], rounding=2);
        // tube
        translate([0,-68,0]) zcyl(l=13, d=26, rounding=2);
        // screw
        translate([0,-79.5,0]) cuboid([15,13,13], rounding=2);
        translate([0,-84.5,0]) xcyl(l=15, d=13, rounding=2);
        // back leg
        translate([0,-56.5,0]) rotate([90,0,0]) prismoid(size1=[80,13], size2=[25,13], h=13, rounding=2);
    }
    translate([0,0,3]) cuboid([110,110,11], rounding=2);
    // middle round
    translate([0,0,-2.5]) zcyl(l=2, d=80, rounding=1);
    // tube
    translate([0,-68,0]) zcyl(l=13, d=tube_dia+.5, rounding=-1);
    // hex screw hole
    translate([0,-84.5,0]) {
        cuboid([1.5,20,15]);
        translate ([-4.5,0,0]) rotate([0,90,0]) {
            DIN931("M5");
            zcyl(l=15, d=5.2);
        }
    }
}