I'm looking to get PID for my lee 4-20 and am looking at getting the parts to build myself I was wondering what you guys are thinking is the best route, I found the Auber website and it looks like everything is there I need, just wondering if there are other options out there. Thinking I just need the controller ,ssr ,heat sink, and thermocouple. Anything else besides a box to mount in?(I have one of those).Thanks.