As an architect I am involved in trying to find answers to complex architectural problems. I have found that with a lot of thinking on my part and asking questions of others in my field I can arrive at good answers to my many questions. However in other fields including bicycles there is little published and little access to those in the know. Therefore I guess at many answers to my own questions. Many times I have drawn the wrong concussion. So once in a while I ask others like the CR people Thanks for all your responses Charles Nighbor During a lull in wheel building Walnut Creek, CA