We use Scholer, Slotting Plus, Scaleauto , Plafit or 2Naste. All are similar in that bodies rock on H bracket. Proslot 16d motors used on most classes but we have one class that uses Hawk 7. Below are images of a typical chassis and images of cars in several classes we run. Note the custom cut front and side pans (these work very well to improve handling with more powerful motors). These cars are run on my 4 lane wood track (see image below)