sleek, that is a great idea. I need to try that--especially since I try very hard to match spine in a set of arrows. There are so many variables, however, including just variations in the wood, that I might still see some differences. If they all react the same, then that should tell me something--of course, there are a lot of things that can make you miss left, too--like overgripping the bow, plucking, etc. hard to eliminate those as well.