The side and bottom panels are cut from 1/8inch HDPE. This material is inexpensive, easy to cut, and durable. The pieces I ordered from McMaster already came close to the correct size, so there was minimal cutting required. The top is Grey Tinted Polycarbonate, because I wanted the coolness going on inside to be visible. It's not as dark as I was hoping for.
An air filter is installed on the right side. Clean air is pulled in over the electronics. Hopefully this will reduce the amount of dust in the unit. The air filter is a standard 10"x20"x1" home air filter purchased from Home Depot.
I'm considering mounting the exhaust to the underside of the Z table. This way it can be used as a suction table also to hold flexible stuff flat.