I am currently finding it hard to manouver my racquet and so volleys and rushed shots are very hard for me. After a couple of hours playing, my arm also tires. My racquet is the Youtek Speed MP, which has a SW of 322. I hit with lots of topspin and alot of wrist, akin to Fernando Verdasco (terrible role model, I know). So I was wondering, how much should I reduce my SW? Would a SW of 310 be a significant decrease? I was looking at buying the Pure Drive GT Lite (SW 309) or the YOUTEK IG Instinct (303 SW).