Oh. I'll stand on the inside the normal way.  I need the exercise.  I'll get dive bombed with the other foamies but they seem to miss me.  They all turn left circuits anyways. I tried it once with a electric control line once. I'll wear a helmet and safety glasses, (maybe hockey pads)  Safety forced.  As for officially, any time you compete there is always someone saying you cheated and brings out the rule book.  Just for fun, whatever is good is great.