Chris, I do appreciate the response and your research. To me, an external drip guard attached to the door would catch drips that would normally run down the SS firebox door. That would be more appealing (to me) than seeing the stains on the door. I would think you would only see the drips in the tray while standing right at the smoker, but from any sort of distance, it would look much better.
I would think it would be slightly higher on the right (open door side) so that anything that didn't sear off right away would work its way down to the left and drip on the ground. Not sure if this would break with the symmetry of the box shaped smoker and look out of sorts or not.
My only question would be how far would the guard have to stick out from the door to catch anything that would drip down? I would think only a couple inches, but if it had to be wider, I could see it being a shin or knee biter.
I would definitely be willing to be a (paying) demo tester if y'all are interested. Y'all have my number, but you can PM me if you need any information.