We used a form of a "two layer" electrical panel for Aerial Assist. Since the most of our inner area of our robot was reserved for the ball/shooter, the bottom of our board was also our skid plate/the bottom plate of our bot. It was made of
Alumalite, which is what we've used since. It requires an extra step during inspection to make sure no extra power/current goes through it but it's good for weight.
We had a plexiglass cover on top of it since the shooter would rest on top of it. For easy access it actually had two pins that would go through the board and into our PVC chassis. You can kind of see it in
this photo. It was quick access if we needed it and it didn't include the radio, since that was higher up as you can maybe see.
We've done similar things since, last year had a vertical panel with a clear hinge panel over it and this year we plan on doing the same but just for the PDP and roboRIO since they also seem to be sitting under our shooter on our skid plate bottom board.