Weight
Minimum weight of 12th scale car without trnsponder is 28 oz. Thats ROAR and also US Indoor Champs, etc....
My Rev.3 is always underweight and its got a lot of pretty aluminum on it as well as GP packs!!! I add between 1/2 to 3/4 oz. to make sure it makes weight by 0.3 to 0.5 ounce!!!