Agree with the other posts - if you aren't confident with something don't use it. I've used the 3 blade and so far am quite happy with them. The main thing I'd be looking for is a SHARP bladed head that will fly where you aim it, regardless of size. More often than not its the ability to make the shot and shot placement that determines the outcome, regardless of fixed or mechanical or 1-1/8" vs. 1-1/2".