I enjoy M chassis racing but I am concerned about the restrictions you have placed on this class. To require racers to use only one motor from one manufacture is too restrictive. M class racers all ready have 21.5 ROAR legal motors they own.Why the need to spend $90.00 for a new motor?Certainly you don't want to turn away racers with brushed Johnson motor/brushed esc setups,either.The same argument against a spec tire rule tires is valid.ABC Hobbies Grid cars should be allowed to compete with Tamiya M cars.I understand your desire for a level playing field but your proposed rules will severely limit participation.