I have thought of using urethane glue. This would be preferable to frankenstein bolts. I think that would pretty much guarantee that the monitor aint going nowhere.
No arguement there. As they say: "An ounce of prevention is worth a pound of cure."
So I guess in the old days, monitors were just falling out of cabinets all the time? 
Nope, they bolted them in place.

I have seen what a loose monitor can do to a cab's insides, it's
not pretty.
Out of curiousity, what happens when one of these mounting screws gets stripped out or loses it's head during the cab's assembly? How many blown screws would cause you to fail the cab during QC?
Anyway, as I said, when the monitor is bolted in place, the brackets essentially become part of the monitor frame. This means that the brackets are held to the side walls by SIXTEEN screws, and they can not push inward because they are being held apart by the monitor frame. Exactly how do you think they are going to give in?
I'm thinking of a cab bouncing around in the back of a semi during a 2,000 mile cross country journey. Trucks doing the side to side slap when the driver has to jump the curb with the trailer wheels to make a turn. Cab carton/crate being banged around on loading docks by the forklift operators. Stuff I see happening all the time. Some guys can f$%k up a crowbar. You'd be surprised how many of them work in the shipping industry.

Seriously though, I'd suggest at the least taking a prototype, and mounting a dud 9200 monitor from the brackets. Bounce the cab around to simulate what it'll recieve during shipping, and then examine the brackets to see how they hold up. If they do, you're golden.
