I ride a 93 DeRosa outfitted with a Dura Ace gruppo from that same year. This past spring I not only had one but two tuneups completed on the bike of which one was an overhaul. I still however while on the small ring up front miss or should I say skip gears while downshifting. I'll change gears, hear the click then all of a sudden bang my gears are doing a dance and then they settle into place.
Some folks on the forum through other threads have mentioned that wear and tear of either the chain or rear cogs can cause misshifting. How do you diagnose this? Also how can you tell when your cables are worn? Any help would be appreciated.