As I get older and a recovering should injury - my range of motion has lost some flexibility but I see guys getting the distance better than I do and my head speed can average 106 - 102 and sometimes get as high as 112. I have a 9.5 910 D2 with a black Diamanti stiff shaft and I generally hit it around 245-260 - yet there is a thirty yard difference if I make a fuller swing and feel like the shaft was doing more for me. I am looking at a new D3 head and want to have a lower ball spin - I have very little problem hitting med range high but I think the shaft choice may allow me some increase in distance based on my head speed. Hcp 5 former college player.