Speaking of the metal cage surrounding a monitor chassis, when I replaced the WG in my Gauntlet cab, I used a 21" NEC and had to leave the back of the cabinet open so I didnt crush the cage. It was a bit of a pain since the cab wouldnt butt up against the wall completely. It stuck out about 1-2 inches, but if I remember if I removed that cage, the chassis would be exposed. Not the best thing to have.