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@Linc
I forgot, I've got a question for you lot. I've got Sugino cranks, Stronglight chainring and a freewheel on the back. Sheldon told me that I needed a 109 bottom bracket so I used a 110 Shimano BB that I already had. It sends the chain line a mile off and I've had to mount the chainring to the inside of the cranks to get it to run straight. I'm measuring 42mm from the center of the rear hub to the centre of the freewheel whereas with the chainring on the outside of the cranks I get more like 52mm at the chainring. I don't know exactly what the model Sugino cranks are, but does the fact that they have shoulders for mounting the chainring on both sides mean that it's a double rather than single?
Runs beautifully but obviously looks slightly wrong as the chainring is on the inside. Doesn't look like theres enough space for a much shorter BB. Any tips other than changing the cranks?