I think there will be a guy I know who will want to turn up with his Battle Rat, what is the ruling on these competing with the feathers? Its completely standard as the come out of the packaging with the spring flipper.

The only thing I can think that it won't have is the LED power light, but transparent so you can see from the ESC that the power is on/off and given that it isn't all that powerful (on the grand scale of things) is it ok to go along unmodified?