Yes you are right I did buy a bigger fan for the offset, but found that I could control the temps better than the Guru. The problem is that when the Guru over shoots the temp it shuts off the air flow, which starts to give you white smoke.
Since the
WSM is mainly using charcoal with some wood chunks, it's not a problem. So if your burning just wood I would forget the temp controller, cause you have to be there to feed the beast every 45 minutes to an hour anyway. My Lang likes to run around 270-280. So that's where I let it run, I just add a split every once in a while & the temp just stays there.
Al