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Which campagnolo bb? The sealed unit?
If it's the one I assume it is I'd buy this - https://www.evanscycles.com/park-campagnolo-bottom-bracket-and-cassette-lockring-tool-00103329
(Evans was the 1st link that came up)
As for the spider rubbing maybe you could buy one of the campag bbs that have sliding cups, so you could adjust your chainline that way. If you stick to campagnolo means you can use the same tool
They look like this:
I'm afraid that my favourite sugino 75 won't fit my mash sscx with a 111mm centaur bb - the spider might touch the chainstay. Though I've seen builds with 109.5 hatta bbs + sugino75, I'm kind of in the discovery of a new option that will give enough clearanca to fit. I'm okay sacrificing the perfect chainline by like 2-3mms, as it's gonna be SS. Anyone know any good bb options for that?
Also any recommendations for DECENT tools for campa bbs?