I was going to demo both of these racquets but wanted to know which is more arm friendly? I've had some shoulder problems and although I tried using the POG OS and didn't like the OS head size. About 3 years ago when I was using various demo racquests, I really enjoyed the Yonex Ti 80, the MP Tour-1, and the i.Prestige. I've heard a ton of good things about the LM Prestige mid. What specs "qualify" a racquet as arm friendly? I'm also not going to use polyester string, which I've heard is unforgiving on the arm. I sold my i.prestiges on **** and other than the i.Rad I gave to my girlfriend I am racquetless. Any input/help is greatly appreciated.