What state are the cables? I'd suspect a burst in the outer, a burr at a cable tip or muck.
In my experience, Campag 9 needs minimal twiddling - set the high and low stops, fit cable, pull at the excess under the down tube to settle the outers solidly into the cable stops, re-secure cable at the mech and try indexing. Maybe a half turn to sweeten things up, then 3000 trouble-free miles of riding...
In my experience, Campag 9 needs minimal twiddling - set the high and low stops, fit cable, pull at the excess under the down tube to settle the outers solidly into the cable stops, re-secure cable at the mech and try indexing. Maybe a half turn to sweeten things up, then 3000 trouble-free miles of riding...