I used the carlon 12x12 box. It fits everything but space is tight. I also went with the 1/32 DIN PID's to save a little space, that helps because those things are small. Once you get the wiring, relays, SSRs, outlets, etc in there, there's not much room left. Also, the plastic is easy to modify with simple tools compared to metal. The carlon boxes are thick durable plastic as well. I'd recommend them.