I need a rear rack for my Discovery 501, I bought one of Ebay but it won't fit, the frame is too wide at the drop out. Bought a Trek one from my LBS, that was not wide enough but at least it has screw out lugs, at the furthest setting I could get it stable, but aligning it straight means bending one of the lug threads against the frame, not good. That's now on my wife's 201 and fits a treat. Then I bought a Blackburn expedition rack from a well know Ebay cycle seller having been assured fit would fit, it doesn't. At the base all three "legs" merge together and make it impossible flex around the frame and to align correctly. There must be a rack out there for me?