No, what I meant was that you fully tighten the "adjustment" bolt that you said you cut a slot into. You don't stretch the belt on, you loosen the "adjustment bolt which moves the pulley so the belt will slip on, then you FULLY tighten the "adjustment" bolt until it bottoms the pulley bracket. you don't worry about belt tension or anything else. Because of this, it leads me to believe that maybe it is a stretch belt that self tensions.