For 3 years I played the 917 d3 driver and loved it. A few months ago I switched to the ts1. I'm 71. a 8 handicap, average drive 200 yards. Since my swing speed is slowing down I went with the ts1, advertised a being the correct choice for me. But, I was more accurate with the d3 and I'm not seeing any yardage gain. Wondering if anyone else has made a similar switch and what they found.