I'm lucky enough to be in qc at an industrial fab shop so I have access to a lot of free wood & fasteners. It started life as a 6x4 crate. Grabbed a 6x3x1/8 acrylic sheet from ace hardware. There's a top in the garage. After some vent work I'll be able to totally control my parameters instead of spinning my wheels. I'm pretty pleased with how it's coming together.