I am having a lot of trouble hitting my new Hybrid 21 with the std. Titieist Diamana Stiff 80 - I just cant seem to hit it straight. Play to a 6 hcp, I played Titieist Forged Zblend irons with the project x flighted 5.5, and hit my irons very very well, usually very straight, and have no trouble with my 3 wood either. I am wondering if I should try a project x shaft for the Hybrid that would match my irons. Seems logical to me - any experts have an opinion on this ?