Campagnolo 11s Shifter Rebuild

[Lovetoclimb]

My 2010 Athena shifter LH will not hold the cable tension necessary to keep the chain on the 53 ring. As they have somewhere between 10-12k miles, its maybe time to rebuild . . . and I am very interested in seeing how a shifter works internally. My shop sponsor has offered to help me but he has only done a handful of 10s shifters. I am curious are there additional steps for the 11s or just different parts? Any resources one can provide would be very helpful. Of course knowing OldPotatoe can fix any damage I do is a great safety net!