I recently did a Driver Shaft fiting and am so happy I did. I am a High spin player and have a huge problem with gettig role. I have a swing speed of between 111-114 and can get to the low 120's when I go after it. I went to do a shaft fitting and the numbers were 11.3 launch with 3300rpm average for 10 balls with my 8.5* 909D3 Aldila NV65x tipped 1.5" playing length 45". So after a few shafts we found the one. I now play the Aldila RIP 60x untipped at 45" got me to 11.8* launch with 2850rpm's which I know isnt the "optimal" conditions but its the best I can get for now. I am hoping with the new 910 and the same shaft I will get the same or better results. I picked up about 11 yards on the trackman with a 10ball average of 307.3 yards at 16yards dispertion.