I was fit today for a 910 driver but it was a little incomplete. They only had the 4 standard shafts to try, which is about normal I suppose. I hit them all well but the best combo I hit was the 8.5 D3 head with the stiff Diamana whiteboard. It go me out there in the 270 range with average of about 800 RPM draw and backspin in the 3500-4000 range. Around 95 to 103 MPH head speed and 150ish ball speed. My major question is should I go to a real Diamana whiteboard and see if it will get the backspin down better than the made for. Launch was from 17 to 15 degree. Before I dish out the extra cash for one I wanna know the difference.