I recently bought a used aluminum car hauler flatbed trailer. Sometime in it's past the driver side ramp door was pried off, I assume in an attempt to steal the aluminum ramp. That door was replaced and the passenger side door shows signs of being pried on as well but the stock door is still in place. Both ramp doors have provision for a padlock but I'd like to make it better. What have you all done to increase ramp security?