Thanks for all that info on Proflex! I also am obsessed with them. I have seven of them........I know I'm a HOARDER but I can't resist a deal when ever it comes my way. Here's my list 755,855,856,[2]656,beast& a 656x which I believe is a prototype because it has front & rear disc brakes. The X I took as experimental? It's the only one I ever seen with discs. Your feedback would be appriecated. Thanks