I have a 910F 3 wood and want to change the shaft on it, it currently has a kail'il 75 stiff shaft on it and I want to put a x-stiff shaft on it. I'm not sure what my swing speed is but I know that it is over 100 mph. currently I hit my 3 wood with a low trajectory and would like to go to a mid trajectory. I haven't changed the lie or loft because I don't have the tool so its at A1. Do you have any advise what shaft I should change to, I've been looking at the kail'il 75 x-stiff or the project x 7A3 or 7B3.