I've been thinking of adding a master kill switch (that disconnects battery power) inside of the engine compartment, then installing a very heavy duty hasp like you see used with a "puck" style lock to secure the rear door closed when not in use. I planned on welding all pieces to the frame & rear door, eliminating the need to use their very failure prone rear door latch. I figure that way it would be electrically dead & there would be no way to reach the parts (such as, starter, battery, main electrical harness, etc.) that you would need to get to in order to jump it off / steal it. I am more than certain that there are other machinery out there that is set up in a similar manner already. If I think about it long enough, I am certain that there is a way to outfit every machine for around $200, or less & still have less to carry around / maintain / not lose versus adding a locking bar to the cage area. All of this will probably sound too hardcore to prevent what seems unlikely, but just one machine lost due to theft is a major dent. Where I live, nobody leaves them sitting around anyway. They usually baby sit them during lunch & take them home (or back to the yard) at the end of everyday. The only companies that I see leave them out are the larger construction companies or rental companies; I'm guessing that they both have amazing insurance on them, though. Feel free to give me some feed back as to what you think about my plan.