I used a few 3mm spacers on the steering rack screws, but they were not part of any shim kit... It's really up to the racer to shim where necessary until stuff binds, and then backoff enough to allow for the correct amount of play(0.1mm or so)... Every tc4 is different as far as play is concerned, and should be shimmed uniquely.... The hinge pin play is something I never messed with...