I was looking through your Tank Battalion pictures and am curious how the CP/bezel piece attaches? I see there's the tinted bezel that mounts below it, but how is the bezel/CP piece attached to the cabinet? Or rather, how is the whole thing attached in a way that the weight of the bezel side wouldn't break off of the CP when that portion is removed from the cabinet?! 
that's something specific to the namco cabs, in fact there's no separate bezel and CP+CPO.
the whole thing, bezel + CPO is made of PVC (or other material, not glass) that covers the screen (bezel) and CP (cpo)
see the bezel picture on
vectorlibyou will see that this beauty also holds the holes for the joy and bttons + instructions
furthermore theres another tinted plexi that sits on top of the screen.
Is there a separate CP metal piece held in with the latches where the joystick/button assembly mounts, then the plexi sits on top of that, then the joystick ball/buttons/front bracket piece holds the plexi in?
yes the CP is metallic, ys it's hold by latch, yes the plexi sit on top of him and yes the buttons are used to hold the plexi, but further more there's is a metal retainer (same kind than marquee retainer) that helps in the fixation
Looks like it's made out of the same sort of shiny white melamine plywood that the Nichibutsu cab I'm working on is made out of.
plywood + melamine, you are right.
so the cabs are not as heavy as some other cabs made of other material. they are really easy to move.
