Originally Posted by rmikkelsen
Ok, here's an issue -- putting a modern front derailleur on a classic steel frame. The only Campy 10 speed front with a 28.6 mm clamp is a Record, evidently. But it looks like DuraAce, Ultegra, 105 are also available in that diameter from Shimano. Be interested to learn how others have dealt with the issue.
I made a shim out of plastic to put a 600 FD on my Varsity. Ended up using the "Schwinn Approved" one until I can find the appropriate clamp-on cable router because the 600 expects the cable to come out from under the BB instead of off the top of the down tube. And you know what? That 600 probably won't shift any better than the crappy rusty one I have on there. Front derailleurs really haven't improved a whole lot in the last 40 years.