While I agree that we don't want to discourage racers from buying cars, it was the LACK of rules that causes that situation. No one wants to buy a car and find out that it won't be allowed for some reason. Make some rules and allow everything that is currently in the pipeline and running on the track (that isn't 4wd or suspended). That should solve those issues and also notify future builds or builders or companies what they can/ cannot do. Almost every company would prefer rules because then they know the parameters and don't have to guess whether their product is "legal" or not