I have just received the Graphite Pro I bought very cheaply off the bay. Its everything I thought it would be. On a previous thread about the Comfort Edge, this racket had it all, it was beautiful looking, had great flex but was stiff too in a way (is this due to the short throat??) and the most amazing feel, hands down it wallops the twaron fibre rackets all over the shop (IMO)! All that was missing was a slightly larger headsize (81")......thats were the Graphite pro (made in austria) makes an entrance. My question is.... What actually is "Vibration-Control-System" as its the most uniquely soft, dampened feel I have aver felt in a racket. What are these rackets made of ?? ....also if anyone knows. Would Head string these rackets (in the 80s) with gut to sell off the shelf, am I playing with 25yr old gut and is that why its so soft ??