So I find 8 and 9 speed shimano rear derailleur mechs readily available and have heard of the shimergo theory. I have read quite a bit and understand most of it, but I would like a pretty simple answer form people who have successfully done one of the two.
Run a 8 speed shimano cassette and RD with a 9 speed set of Ergos (if so new or old) OR
Run a 9 speed shimano setup with a set of 9 (unlikely) or 10 speed set of Ergos.
I love my campy bits, but for budget builds I would like to find a cheaper alternative that utilizes the same ergonomics.