beer=food

This might sound stupid, but have you considered using a match box sized GPS tracker device, built into the chassis somewhere it could prevent this type of theft everyday, very easily fitted to such a huge RC, maybe consider this type of thing in future if you building such an expensice beast, they can run for months on one battery, sort of like the boaties emergency beacon, there used in the wild to track animals a well but there much bigger, just a thought for your next one, get a matchbox size tracker device, so if it is stolen, at least you can recover it.