I guess I am used to the NT we have a system where you can do damned near anything to a vehicle so long as it is approved by an engineer, it is then registered as a one off manufacted vehicle.
To go out side of standard i am happy to pay to get an engineer to check it over. I would have a hell of a time morally if I caused an accident and it was proved that I had made the vehicle unsafe by not getting the modifications checked and approved

