I'm a not so proud owner of two MES 30 - one is the older Gen2 and the other one is a newer Gen1. The Gen2 had served me faithfully for 6+ years until the control panel got moisture in it. It still works but throws fits once in a while (quits in the middle of the process, etc). The newer Gen1 I bought this year is suffering from a severe swinging temps disorder and just seem to be unable to hold a steady temperature. I've been exploring several options of replacing the top control panel on both smokers with a PID device that others posted over the years: either plugging an Inkbird-based PID into the control panel wires or shorting the +5V wire and smoker's relay wire with the 1K ohm resistor and use an Auber plug-n-play PID. The problem is that I'm not sure how to correctly ID the wires going to the control panel. The older Gen2 has 5 wires: red, yellow, blue, white and black. The Gen1 has 4 wires: red, black, white and blue. Any suggestions on how to figure out which is which?