I just spent over an hour and a half at the California Fitting Centre and what a treat. Glenn Mahler was so knowledgeable and helpful and I can't wait to get my new D2 Driver and F2 3 Wood. I learned so much about what I can do to get better ball flight and keep the ball in play. When I was in Edmonton being tested at a reputable golf store I was told not to buy the 917 as there was no noticeable difference from my 915. It was suggested that I continue with a regular shaft even though my swing speed was 105. After 40 minutes on their incredible range in California I was hitting it higher, longer and getting more carry. I went from a 10.5 set to 12 degree in the 915 to a 917 8.5 set to 9.25 with a draw weight of 14 grams in the Driver and 16 grams in the 3 wood. We tried about 6 shifts and I am so happy with the Project X HZRDUS 65 stiff shaft in the driver and the Diamana White 70 Stiif in the 3 wood.