That sounds like a lot of work. Maybe you should just take the money you are gonna spend on the guru and buy a WSM. Then you won't need a temp controller. Not trying to be a jerk, but that's what I would do.
I hope someone can answer your original question for you.
"I can get a good look at a T-bone by sticking my head up a bull's a$$, but I'd rather take a butcher's word for it". - Tommy Callahan III
XL Big Green Egg, 22.5 Weber OTS, WSJ Gold/Mini WSM, 18" & 22" WSM
Flyers Orange Thermapen