I just went through a fitting for the new TSR driver and 3 wood. The change from the TSI heads was amazing. End up being fit for TSR2 10 degree driver with a Kuro Kage shaft. The 3 wood was a 16.5 degree with a Kuro Kage shaft. I was blown away the average ball speed was up 4mph and carry 10 yds. The feel of the ball coming off the club is unreal and very hard to describe. Safe to say the old TSI3 diver and 3 wood are destined for the basement. My old TSI2 3 wood could not keep up to the new TSR club. Did not think Titleist could improve on the TSI driver. I was wrong big time.