Yup guys thats right, im doing this, i intend to make london bridge using the same architechture from my destroy/collapsable tower.... NOTE it will be smal ish so in future i can add it to the tower and other destroyable objects to create a demolishable city, fully collapsable, fully destroyable FUN FUN FUN!
IDEAS HERE??
You could maybe use pistons or aray? Im not too sure, but good luck!