I recently just put campy 10 spd powershifts on my commuter with 8 spd shimano. works perfectly with no mods, and gearing is fine with a triple on the front. I want to do it to my rando bike, but since I want to stay with the compact double, I would like to go up to 9 spd cassettes. Just wondering how the shiftmate is working, although I understand it isn't the same as what I would be using? And I'm curious about the left ergo shifting performance - powershift or ultrashift?