I am an NTRP 5.0 player, trying to transition to the 2013 Babolat AeroPro Drive Plus (27.5"), however I consistently have pain in my shoulder after only an hour of hitting. If you look at the reviews for other extended length racquets, such as the Babolat Pure Storm 27.5" there are similar comments from feedback. http://www.tennis-warehouse.com/feedback-BPSTRP.html Any advice on making a successful switch? I'm currently playing with the standard length Babolat APD 2013, however the plus version suits me better with every avenue. I'm very physically built, which makes it more frustrating. It's rotator cuff pain and I know it's physics. Anyone go through something similar?