I had forgotten about any cutting hole issues (in the body), we do it all the time to keep the motor / ESC cool for 1/8 scale brushless. Its a good thing that rule isn't enforced in the venues we visit. But then we havent run head to head against Nitro either, which is probobly when it would be raised (if we won).

The racing we've been involved with, only electric was on the track and everyone was doing it - so things were even.