N8man: thanks for the tips. I like your DrumPit, especially the portability. I was going to use the ball valve to regulate the intake, but your magnet seems to be a cheaper option - maybe I can save a few bucks. Was going to drill intakes in the bottom and use nipples with caps, but I think I'll switch to the magnet/hole combo.
Does adding the stack to the exhaust add anything in particular? i have seen some folks add one, but not all.
I also noticed that you still have the bolt ring on your drummie. Does that help keep it air tight during the cook?
Have a good weekend!