Originally posted by John E
Part of the problem may be the indexing of the STI shifter. With friction shift (the only way to go on the front derailleur control, as Campy still realizes), one can control the motion of the cage and guide the chain to avoid overshifting. Also, being able to fine-tune the position of the front cage allows a narrower cage to be used, which also reduces the chance of overshifting.
Hurrah for friction shifters.
I use Campag downtube levers on my main bike and never have trouble shifting or adjusting the chain run (they activate a campag front mech and a Huret duopar long cage rear), but on my other bike the front is friction, the rear is indexed (both Shimano and both mechs too), but I can't get used to the indexing.
I'm going to swap to Campag levers as soon as I can find some mid 60's ones. (the bike was built in '63)