Thanks for the response Charlie. I will check em out. I really think the best up speed is going to require a true and smooth tracking window. Also, whomever it was that had noted in an earlier thread that there ought to be a helper spring installed was probably spot on. I would gladly trade off some of the down-speed for some up speed. All things considered, with the Ebody glass being so large and heavy, I believe the E-L system will only provide a low to moderate up-speed.