The only snag was not finding an NOS Campy 27.0 seatpost

I went with the Synchros for that reason. I'm 6'4" and the frame is just a bit small for me at 60cm. The Synchros post works perfectly, is 250mm and is still lighter (7075-T6 aluminum) than any Campy post from the 80's.
All in all, the build went without any mishap. I've since changed to a lighter wheelset, and NOS Chorus aero-toeclip pedals are on the bike.
Are you going to be installing new or vintage parts on your frame?