I put the Battery and Switch at the bottom.
Different people has different ways to deal with Cop-lights. I made cop-lights with self-flashing LED. (You know, in Shenzhen, it's easy to buy.) You can also make a cop-lights that can not flash. But I think this paint must be with this kind of "2-column-red". No blue lights on it or aero lights or decklights, forget them!
