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@ghettro
The groupset looked like it had been taken off a bike that had a fair bit of use and had been store outside or in quite moist conditions. Shifters still worked perfectly fine but I made the jump and decided to pull these apart and rebuild them. I'm somewhat mechanically inclined and have rebuilt Sram 11 speed levers, there is a fair bit of info out there on how to do it too.
This is the left lever disassembled. Actually quite interesting, you can see the little round plate in the middle with the divots, the toothed plate with the two ball bearings fits into this and gives the correct stops for the shifter. Quite an interesting way to do this, as it's different from Sram and presumably Shimano as they rely on a ratchet and pawl style system. This gives it the distinctive clack sound.
Also what's interesting is that the central shaft the shifter mechanism pivots on runs on 2x ball bearings inside the shifter.
Right hand side shifter disassembled. You can see the shifter plate is different as it has a lot more indents and the shape is different, the toothed plate has springs for the ball bearings.
Now regreassed and (almost) like new. Just need to add new hoods. These were surprisingly easy to disassemble, only odd tool was a T15 driver which I had to buy. Compared to the Sram doubletap design, this has a few more parts but the mechanism seems a bit more robust.
I managed to wear the toothed gear on my Sram Force 22 shifters after about 5 years to the point that it would misshift, the ball bearing and indented plate system seems to be a lot smoother as all the Campag shifters I've ever used have been more long lasting.
