My favorite racquet is the PS88, my most used racquet K90. Arm gets tired with the PS88. Yesterday I decided to play on and inside the baseline hitting all my shots on the rise. The PS88 was fantastic. When setting up farther behind the baseline I typically exert a lot of energy on forehand with the PS88 to really crush the ball. This typically leads to fatigue because of the weight of the racquet. Standing on and inside the baseline, utilizing a short smooth compact swing hitting on the rise, the frame was amazing. The weight and stability of the PS88 is perfect for short compact strokes hitting on the rise and you don't have to exert a lot of energy; and the ball still rockets with a lot of pace. I may have to start playing matches with it to see if this energy saving technique allows my arm to hold up over a long match.