Just wanted to share my recent experience of the TSi2 Driver with different shafts. I tested the 10 degree with the Lighter Kuro Kage 50g and it felt great. Some great distances. Then I tried the 11 degree with the Tensei blue 55g in Stiff. This felt awesome and the ball dispersion was wonderful. Also, not sure how or why, but the ball was consistently out of the centre of the driver face - every time. Overall TSi2 is a great driver.