I had a similar problem with some wide rollers and put a 1/4" sanding drum on my Dremel tool then ground a taper on each end of the roller. Took longer to remove the pickup off the loco than to grind the taper. If you hold the axis of the grinder and the sanding drum at around +-75 degrees to the axis of the pickup roller it will rotate the roller as it grinds and take an equal amount off all around. Might as well do one now I will have to do it before I put it back on the loco anyway. Only did one end of roller so you can see before and after. I could take more off and cut in closer to the center of the roller if need be. I like to paint the taper black keeps it from drawing attention to itself. j
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