[MrForbes]

Like everyone says, use polycarbonate instead of acrylic. But we usually use plywood for our electronics board, it's really easy to attach the components with screws, you don't have to worry about grounding issues (there might be a rule against having the cRio case contacting the metal robot frame), and plywood is stiff and light, as long as you use something like 3/8" to 1/2" thick.

We use a thin (1/16" thick or so) polycarbonate cover over the electronics, so we can see the blinky lights, and we put some thought into how the cover is mounted, so it's easy to get into when we need to work on it. Velcro is helpful for that.