Howdy, I have the D3 with two shafts. Project x 8C4 82 gram tip stiff and the Rayon Diamana 'ahina 72. My ball flight is pretty straight with a slight R-L break. I am getting about 280 yards with both. I like the feel of the project x but wonder if there is a better shaft that I can upgrade to and get some more yards. I just wonder if the project x is just a more stable shaft and if that is why I like it more. I use to get 295 plus with an old SQ with a proforce 72. Should I go lighter with a more premium shaft? Also is the project x shaft designed more my 910F? Any help? Thanks