include <BOSL2/std.scad>

module fan_mount() {
    difference() {
        union() {
            rotate([0,0,45]) cuboid([250,15,3], rounding=5, edges=[FWD+RIGHT,FWD+LEFT,BACK+RIGHT,BACK+LEFT]);
            rotate([0,0,-45]) cuboid([250,15,3], rounding=5, edges=[FWD+RIGHT,FWD+LEFT,BACK+RIGHT,BACK+LEFT]);
            tube(od=172.5, id=138.5, l=3);
            }
        // fan_holes
        translate([52.5,52.5,0]) zcyl(l=10, d=4.5);
        translate([52.5,-52.5,0]) zcyl(l=10, d=4.5);
        translate([-52.5,52.5,0]) zcyl(l=10, d=4.5);
        translate([-52.5,-52.5,0]) zcyl(l=10, d=4.5);
    }
}

*fan_mount();