I play with a Prince Turbo Shark MP(The Original, not O3 Hybrid) and string it with Wilson Sensation @60. I always use a vibration dampener. Since the shark is a stiff frame(I think about 70), I tend to get soreness in my elbow if I play 2 or 3 days straight. My question is what can I do to reduce the stress on my arm? I didn't want to add any weight. Is there any material that I could stuff in the handle, I don't know, maybe cotton balls? I'm a middle to upper 3.0 so obviously part of the cause is not consistently making contact in the sweet spot. Supposedly Sensation is more confortable on the are that most other strings. Also, I don't like the trampoline effect of stringing at the lower end. Any suggestions? Thanks.