The first problem that I see if what happens when someone makes a remote controlled full scale tank? Surely they are least need some maximum dimensions so people just dont build things that can barely fit in the arena...

If they dont.... I think you should all try to get hold of this: http://cache.gizmodo.com/assets/resources/2006/11/298566494_7c0f2d3fd7_o.jpghttp://cache.gizmodo.com/assets/reso...0f2d3fd7_o.jpg and make it remote controlled....