I made a big oversight as I'm used to panels folding out towards me and didn't mention it.
I also strayed from the limits of a "shelf mount".
With that weight, attachment to the outer frame, might pull and twist the frame /facia board . If not to the floor with legs, I'd run cantilever arms like this one, tied to the layout board runners, or to the other side of the frame, or "long enough", or leg to leg, etc. etc.
Flipped up and away from you, that is a lot of weight too. So I like the stationary idea, or even the zw on one door, the meters on another. Another runner going front to rear to support/stop both doors and hold an equal share of the weight on the right side of the zw. (a hidden clasp on the zw door out of sight, accessable via the meter door is how a gaming cabinet control panel would remain fixed tight, yet quickly accessable.
Split doors on the switch banks side too? Screwed down the center map panel or even hinge too?
Even a flip open to the left or right is a possiblity for just one door to swing open a little easier.
