has anyone thought of just disassembling a remote controlled toy car for like 15-20$ and using the wheel and axle and the remote and fixing it to a duck oen or chicken coop door? then using the remote control to drive the axle/wheel mechanism forward, letting the door down and then backwards letting the door up? does anyone think this might work? im just trying to think of a cheap way to do this instead of spending 150 bucks on doing the drapery motor and appliance timer method...