Update: I fired up a chimney of briquettes last night ran it wide open for about a half an hour. Maxed at a little over 425F. Then I plugged the two 3/4" air intakes & the one 3/4" exhaust & throttled back the main air intake to almost closed. It held at 225F until the charcoal pooped out, about 3 hours total. I was a little surprised the factory gauge showed IDEAL at 425F. Pics below: Cheers!!!
If Homebrew & BBQ aren't the answer, then you're askin' the wrong questions... Cheers!!!