slot hole (asymmetric)

slot_hole_asymmetric.scad

// slot hole, asymmetric (different dias at ends)
module slot_hole_asymmetric(
        w1 = 5,  //dia left
        w2 = 5, //dia right (if different)
        l = 20,  //length
        h = 5  //thickness
        )
{
    hull() {
        //left
    translate([-l/2+w1/2, 0, 0]) polyhole(h=h, d=w1);
    //right
    translate([l/2-w2/2, 0, 0]) polyhole(h=h, d=w2);
    }
}