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I saw a video on YouTube recently of a guy with a PartyQ on a vertical Trailmaster. Basically the same thing but the Guru would have a larger fan output volume, which would be a good thing.
The Guru works great on my WSM, basically like setting an oven, but I can't personally attest to how it works on Trailmaster. If I had a horizontal offset though, and it was modified to seal leaks, I'd have a Guru.