Pre-assmbled STC-1000 Pro fermentation controller shown below with dual temp sensor, and programming header with Adruino Pro-Mini flashing device. I modded this device to have both the Red and blue led light to show what function the controller is in and added the Adruino Pro-Mini flashing...
They are welcome to use the mod if they'd like. I always pay it forward whenever I can.
Check out the link to my PID controlled brewery, I'm all about control of the process to have repeat-ability.
The controller is working great, I love it. I can set it and forget it for several hours for low and slow smoking as long as I have enough charcoal in the box. I highly recommend this device. If your going to spend good money on a grill and meat, you should back it up with control of the process...
It's just as easy to do two as one, I would do two shoulders, Only put out the extra when and if needed.it's better to have leftover. If you know what I mean.