Just tried power pads for first time in my raquet. I asked my stringer why they call them power pads, instead of just leather pads, and he said that since the pads actually provide a little more give on the main strings that they are used on (which basically consists of the main strings in the sweetspot of the racquet), this increases the string bowing effect, which increases dwell time and ultimately does provide the sense of having more power in the racquet. He said that is why they fold them several times, because they provide slightly more "give" than just one layer. he said also because it slightly lengthens the strings in the sweetspot, and that makes sense too, as oversized racquets have much more power than mid and Midsize frames. Any thoughts on this.... Seemed to make sense to me. and I can definitely feel the difference in my PC600. by the way he said that they should be replaced at each striniging because as leather gets worn down, it looses it's "give" to the main strings which reduces the extra "bowing", or "cupping" effect, which is why natural gut is known as the ultimate power string, because of the extreme bowing or cupping effect of the ball.