Thanks for all the help guys. I was just thinking about a pressure actuated switch plate. As a Vehicle or tank moves on to the plate,it activates the gun. Being in a direct line of fire say on a bridge the tank has simply nowhere to run accept forward or retreat. The same set up can be used to dissable the gun to completely capture the objective. the tank just has to defeat the gun then he can keep it deactivated by parking on a second switch plate located on the gun side of the objective. Sounds easy enough. LOL I think i'll try that method first. the big question is how to get the pad to activate the battle system. i suppose it would just be like pushing the firering on the TX.