Is it hard to hit some really heavy topspin shots with the LiquidMetal Prestige(Mid) racket? I saw Paul-Henri Mathieu do some today when he was practicing at the Pilot Pen. But then I thought, he doesn't use the LiquidMetal. So I have really 2 questions. Is it hard to hit a lot of topspin with the LiquidMetal Prestige, and is there more spin on the PS 600(is that what he uses??)?