stock ballstud shims? I don't know where to start on carpet for low rollcenter. So far the stock setup is working good, so I guess I stick with that. Other than I need less rear toe and better on power steering into the corners. I put a 1mm shim in each wheel and I used a buttonhead screw for the shock mount instead of the ballstuds. This way I could still use the outside hole on the front arm. I'm using 26mm foams. It works without grinding anything.
RPM ballcup? I'm using them all around with no rubbing anywhere.
I need front arms before I'm back in the game.
The drivetrain is great out of the box. Other than the front input shaft nag. I wonder why people are having problems with that? No degreasing for me and it's as free as any well worn in TC3.