I forgot to mention those things. I bought the MoJo clamps and bar. But with his teflon clamps you still are better off tighteniing a good bit and a strap around on arm on the changer and around a spoke on the wheel.another tip, instead of trying to tighten down on the rim so hard to stop it from turning. Tighten it snug, get an old leather belt and wrap it around a spoke and one of the arms on the HF changer and it makes life easier. MOJO bar is a great investment too.