Well someone has to say this and it might as well be me. Strange!! Sad new world really. If I thought that Mr Tragle knew something that no one else does then perhaps it would be worth paying him. From his postings he seems to be ill and pompous. He has told us that we would not be able to understand what he could write in a 300 page book. Well I for one doubt that. No matter how fine an engineer he is, or has been, it is sheer nonsense to suppose that there is no one else on this forum who has the capability to understand mechanical engineering matters at this level. If he cannot explain things in such a way that at least some of us can understand them then that probably says more about his ability to write clearly than it does about the rest of us. As for the speed he claims he has achieved with a fully equiped road bike then one has to ask what is it that the rest of us have failed to understand over 60 years that he has discovered. There have been some very fine engineers involved with developing Vincents over the years and I do not know of any who claim his prowess or his speeds. A uniformed mental defective with a radar speed gun is not the same as a properly timed run over a properly measured distance. Politeness and an unwillingness to offend a person who is mentally ill has persuaded some of not to respond to his provocations in a like manner to his rantings. Enough. Either put up or shut up Rip. Of course non of we older people can do what we could 50 years ago but we sure as hell are able to tell people what we did do and how we did it.