I was wondering if anyone could give a bit of advice on this issue. I play with Voekl's V-Engine, Mid size frame. After playing for 2.5 hours my opponent mentioned that my serve seemed to lose its bite, and pace. I also stoped hitting through the ball on groundstrokes. If I switch to a lighter racket with a bigger head size, will that help? I have found a place in Austria that will ship rackets, and I am interested in Kneissl's Red Star. Does anyone know anything about them, other than they are expensive? Thanks. Some additional notes: I am 34, 6'2 and play lefthanded with a 1 handed backhand. I have a left spin serve, and hit a heavy ball off both sides.