hi, i just installed a 8/9 speed freehub on my rearwheel which had a 6/7 speed freehub on it before. i followed sheldon's advice on his page on shimano cassettes, but have 2 questions. with the new, longer freehub, i only have about 3mm of axle sticking out of each end for the frame to sit on. i know sheldon says this is no problem, but the guys at the workshop i was working were skeptical. anybody have any experience with this? (axle length = 137mm, frame width, inside to inside = 130mm, thus roughly 3.5 mm on either side to actually seat the frame.) secondly, i tried to dish the wheel to recenter it, but it seemed to need 5mm or more pull to the cassette side, and the spokes there are already tight and run almost straight from the hub to the rim. is it better to have the wheel completely centered and have a very lopsided looking wheel, or to have the tire a bit off and have a more even wheel? thanks for any advice-- v.