Hi, I'm a bit confused by the racquet stiffness ratings. Both the Wilson Tour 90 and Volkl Tour 9 have a stiffness of 68, but I found the Volkl considerably stiffer than the Tour 90. Both racquets are strung at 60lbs, the only difference being the Wilson has natural gut. The Dunlop 300g has a rating of 64 and I found the Volkl Tour 9 even stiffer than that, almost board-like. Is it just me, or are the stiffness ratings a bit misleading? Han.