Mexican ATC (The "Solamenteme").
Two pipe nipples and a ball valve.
Building my own now that I have my UDS pretty much dialed in.
It's based on the Arduino, and the code is written. I just need to hook it up to the UDS with some chicken thighs and do the damn thing.
Dbl Bbl Smoker, UDS, ECB, Char-Broil gas grill & charcoal grills, SJ - Certified Moink Baller