Originally Posted by MacG

First order of business: install new cranks (Sugino RDs) and new bottom bracket. Involved lots of fighting with said bottom bracket since I stupidly bought a Shimano (ISO tapers) to go with my RDs (that other taper standard). Net result is that my BB spindle is effectively wider than it should be due to the taper mismatch. Fortunately, I had bought a wide BB and a spacer since my BB shell is a weird oddball width for some reason. Omitting the spacer and moving the chainring to the inner spacing gives me a very reasonable chainline for the time being. New 17t cog was installed to reobtain desired gearing with the new 48t ring and the chain was lengthened slightly to match.