tenpins is right on. i had 4 surgeries on my bowling shoulder, i dropped in weight from 15 to 14, i still had a tendency to keep my shoulder tight at all times, probably just from lack of trust and afraid it would tear a tendon again. i never really got the full finish i was looking for, bowled in a summer league, the 1st 10 weeks i felt like i was muscling it and throwing it instead of rolling the ball, the last 2 weeks, with a u-turn particle, i just relaxed my shoulder for the 1st time since pre-surgery and averaged 230 for the last 8 games of the season, my carry was better, my ball reaction was 5 times better and actually my accuracy was much better. the drive on the backend was every bit as good as before, i think it's easier to relax because of the less weight you're holding, that would be my number 1 thing to remember, just my opinion. good luck.