The debate over Federer's true specs has waged on this forum for a long time. As we all know, forum member Greg Raven has acquired one of Fed's frames. He has not only measured its specs, but also made an admirable effort to do playtest comparisons against other similar Wilson frames. His conclusion was that Federer's racquet has virtually identical specs to the nSix-One Tour 90. For some people, this settled the debate. I am not one of those people. I believe that Greg Raven's racquet is authentic. However, I also believe that the specs of the racquet in Mr. Raven's possession are very different than the specs of the racquet Federer actually uses on the court. Specifically, I believe that Federer has roughly 12g of lead stashed under his bumper, and that the lead was removed before it was given away. The extra lead would bump his swingweight up by 30 or 40 kg-cm^2. Why do I believe this? If you study Federer's strokes carefully, and the way the ball responds off his strings, it becomes apparent that his swingweight is much higher than the 330 that Mr. Raven measured. This is most easily observed on volleys and returns. Also, the spin efficiency of his racquet (massive spin without a steep uppercut swingpath) is not achievable with such a low swingweight. As always, I expect many of you to disagree with me. It may be a long time before we have a definitive answer, since it is in Federer's best interest to maintain secrecy of his exact specs (just as Roddick does). But I believe that in the end, when Fed is retired and his true specs are revealed, everyone will ultimately see what I'm talking about.