I built these two spring-loaded, pull-to-release latches to make sure the door couldn't fly open and send the transmitters on a wild ride. All of the wood that I cut and put together is held together by screws and glue so that it can't (fingers crossed) vibrate apart during trips.
If anyone is interested in pictures on how to do some of this stuff, please just let me know and I can provide some detail pics... may take me a couple of days to get to it, but I promise I'll get it done for you.