Thanks for all the feedback. I started with Big Ace mains at 58 and it felt to powerful. I just finished a hitting session with it bumped up to 62 with Micro Sheep crosses at 65. It felt much better. I may give it a try at 63/66. Groundstrokes are very controlled and the ball comes off heavy. Really surprised how well it volleys. Only have an 1 1/2 hours on them so far. Should I expect any changes after the strings settle in?