Jeff use OLs planing method as the nock orientation is tough unless your release is perfect. I have not had good luck with GTs, they are sometimes as much as 8-10#s off in spine form one dozen. It may have changed but when I tried them a few years back they were terrible. Carbon Express are usually very close and Carbonwoods used to be, but have not shot them lately. You can get by with 6 shafts, 3 flecthed and 3 bareshaft and follow OLs method. Do not shoot to many groups at a time though as your brain will adjust and the bareshafts will start hiiting closer to the bullseye. I shoot 2 groups of each and than tune from there and go back later and see how well I do after making my adjustments, whether cutting the shafts some or adding more point weight,etc,etc.. Shawn