I have been (reluctantly) looking to Rotrex NB setups, and I have a question for the supercharged crew. In all installations I have seen that retain both PS and AC, the belt wrap around the PS pulley is really minimal, definitely less than 90deg and most probably around 50-60, which would worry me. I was wondering if any of you runs a similar setup and can provide some feedback. Also, has anyone considered running an overlay crank pulley for the Rotrex? This would complicate the mounting quite a lot, but it *might* be better.