Great bike, I've built 2 recently they are on here
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And here
viewtopic.php?f=23&t=277633
The mavic stuff lasts and lasts great quality. One small word of caution re the starfish cranks, if the chai wheel bolts are original they had a habit of shearing think they were alloy. Might be best and safer to replace with steel if you haven't done that. Either way these bikes ride brilliantly hope you use it a bit. For the carbone its a 23mm post and I got a 23.4 off ebay and had it turned down if you can't find a rubis
Cheers Darren