I have been told lately that my driver swing speed is around the 125mph range, and an approximate average distance around 285, and I am using a R-80 OEM shaft from taylor made. The shaft just doesn't seem to be cutting it for me anymore, I need to go stiffer (Stiff or X-stiff, I really have no idea ). I was just wondering what others people were using. The truth is I just got back into golf this year, and I am not familiar with all this new equipment, and just wondering what the best shaft would be for my swing. Also my current shaft has a .350" tip, does the next shaft I want to put in have to be .350" or can it be .335 tip"?