Most of my motorbicycles are belt drive, and it has always been a hassle to line up my pulleys. My buddy at work showed me a tool he made to do just that. After talking him into making me one, I've been using it on my current projects. What a great way make sure every belt rides true and straight. Keeps the guesswork and measuring to a minimum. It's just two pointed pieces of round stock fastened to a piece of 3/16'' X 1/2'' flat stock. Lay it into one pulley and it points where the other one has to go.