I bought 3 4.2.4 non-thermocouple boards and built one. I'm now building a thermocouple version so I guess I'll offer my two spares for sale at my cost of $14 each, plus shipping.
Built a 4.2.4 non-thermocouple version in Feb. 3 successful cooks so far. Getting ready to build a thermocouple version as well. Just received my board. BTW: I have a spare 4.2.4 PCB board if anyone is interested...