About six months ago I switched to a Tecnifibre TFight 315- and I really like the racquet. Unfortunately, due to me playing every day during my high-school's tennis season, I am beginning to experience shoulder pain. My old racquet was the i.prestige mid, which I never had any arm trouble with. I have searched and read many of your posts, and the i.prestige seems to meet the specifications you outlined for an "arm-friendly racquet," whereas the TFight 315 definitely did not. To preserve my arm I am thinking of switching back to the i.prestige, but one of your posts concerns me. In a thread comparing the Prestige Classic 600 and the i.prestige, you stated that none of them are arm-friendly. I looked up information on the "Racquet Research" site that you had linked to, and found that the i.prestige mid should be an arm-friendly (due to it's stats). Can you please clarify if these racquets (i.prestige and Prestige Classic 600) are arm-friendly? And if they are not, what around 90-97 sq. inch heavy control racquet would you recommend to me? Thanks for all your help.