From 750MC, we adopted the MX5 NA regulation. It works fine so far, people have fun, relaxed ambiance, few if no suspicion, reliable cars. The organiser reserves the right to exchange the ECU at any time of the meeting. The rolling road is a good idea and I'm sure Andy can comment that…
But this concerns modern cars, injection, electronic ignition… In no way related to a Cooper you want to race at Monaco. In this case its hard to believe that the price of a carb or copy of a carb will stop the process. Driving such cars at such places involves "some " money, dont you think so? So, one carb or two and may be three, WTF?