I am not sure if this has ever been done in RC car racing but what about having EXHIBITION races at big events. 8-10 cars, one-and-done race format with no qualifiers and starting order being determined by the race director. This way we could have a round of spec-tire mod, motor limit mod, or whatever, even wacky classes like foam tire touring or foam F1. In order to open peoples eyes to changes we need to have tech exhibitions before making new rules.