If I may contribute to the necromancing:
I have done 10 on 8 Shimergo and did not find it perfect. Some people say they get it to work, I couldn't though.
An option that I think is really viable and quite under-utilized is to gut your Campy lever of choice, and use it with barcons or dt shifters. Now you have the superior ergonomics and functionality of Campy with the reliability and perfect indexing of your barcons... plus any cassette you want. Levers are cheap too since usually you can get them as part of broken shifters and really, Veloce QS and similar low level campy isn't usually worth fixing to any but the hardest core campy fan. 2/3 of my bikes have gutted campy levers.