Sold the Cougar since my local track is pretty beat up and picked up a new b5m kit since it was on sale. Other then throwing a three year transmission and the aluminum rear camber link, I don't think I will do any more "upgrades" trying to keep it light with a lightweight Orion 17.5 motor in the rear and using The TLR aluminum drive shafts from an old 22 I have. Should I really bother doing anything else?.