Yeah, I looked thru that website awhile back....
There was some disscussion somewhere ( Smoke Ring maybe? ) about it & the one thing we couldn't figure out was how the temp was actually regulated?
It says speed of pellet pooping, but there has to be a little more to it than just the motor cranking them in faster?
If there's some kind of temp probe hooked up to a pid controller or what, must be a secret, I guess.....