FWIW, I'm on FA 500s, (can't afford fancy MCS
) using their supplied plates. I had to remove the shims to get the 275s to fit, and even had to go back to near stock ride height to stop fender rub under full compression, leaving me maxed at -2.3.
ninja edit: running apex sm-10s 18x9.5 et-35 square, 5mm spacer in the rear
I believe I will rebuild them before next year (or go another route, who knows haha) and if I do, I intend to get different camber plates and shoot for -3+ again upfront