I am more and more convinced we should have two classes of cars based on some “R1” group like 3d chassis/wide stance/wide tires/low body and “R2” group with stock chassis/narrow stance/narrow tires/high body. That would allow an all out ASCC 3D style assault on the rally and a more scale car race. My Mini would race R2with almost stock size components, and my Porsche could be my second car with R1 wide components. The real full size rally championships have had motor divisions, but I would let the slot car motor be open. (and that is what I learned at the UT Law School dispute resolution (mediation) classes the City sent me to) https://en.wikipedia.org/wiki/Group_R