$fn=60;

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

tube_d1=12;
tube_d2=16;
delta1=0.75;
delta=0.5;

module frontScrew() {
    cylinder(h=20, d=5.4, center=true);
    rotate([0,0,0]) {
        translate ([0,0,-8]) DIN931("M5");
        translate ([0,0,-10]) DIN931("M5");
    }
    * cylinder(h=25, d=5, center=true);
    translate([0,0,8]) cylinder(h=6, d=9);
}

module backScrew() {
    cylinder(h=5,d=3.5);
    DIN931("M3");
    translate ([0,0,2]) DIN931("M3");
}

// [tubes]
* color("grey") {
    translate([-18,0,-80]) tube(od=tube_d1,wall=2,h=200);
    translate([0,0,-140]) tube(od=tube_d2,wall=2,h=200);
    translate([18,0,-80]) tube(od=tube_d1,wall=2,h=200);
}
// [top]
translate([0,0,25]) {
    difference() {
        cuboid([58,25,20], rounding=5);
        translate([-18,0,-7]) zcyl(l=25, d=tube_d1+delta, rounding=1);
        translate([18,0,-7]) zcyl(l=25, d=tube_d1+delta, rounding=1);
    }
    rotate([-90,0,0]) {
        translate([0,-17,0]) difference() {
            ycyl(l=40, d=20, rounding=10);
            translate([0,-9,0]) xcyl(l=20, d=6);
            translate([10.5,-12,0]) xcyl(l=6, d=30);
            translate([-10.5,-12,0]) xcyl(l=6, d=30);
        }
    }
}
// [middle]
difference() {
    cuboid([58,25,20], rounding=5);
    translate([-18,0,0]) zcyl(l=30, d=tube_d1+1);
    translate([0,0,-7]) zcyl(l=25, d=tube_d2+delta, rounding=1);
    translate([18,0,0]) zcyl(l=30, d=tube_d1+1);
}

// [bottom]
translate([0,0,-25]) difference() {
    union() {
        cuboid([58,25,20], rounding=5);
        translate([0,-3,0]) rotate([90,0,0]) prismoid(size1=[30,20], size2=[24,20], h=24, rounding=1);
        translate([0,-27,0]) scale([1,.5,1]) zcyl(l=20, d=24, rounding=1);
        translate([0,12,0]) ycyl(l=5, d=12, rounding=2);
    }
        translate([-18,0,5]) zcyl(l=25, d=tube_d1+delta1, rounding=1);
        zcyl(l=30, d=tube_d2+1);
        translate([18,0,5]) zcyl(l=25, d=tube_d1+delta1, rounding=1);
        rotate([90,0,180]) translate([0,0,9]) backScrew();
        zcyl(l=12, d=16, rounding=-1);
        translate([0,-25,0]) cuboid([11,25,20], rounding=-1);
        translate ([0,-23,0]) rotate([0,-90,0]) frontScrew();
}