I am starting my 3rd build right now. I put my 2nd build on hold as I won't need it till this winter.
My cook chamber is a old propane tank off of a forklift I have the top cut and the valves out and rinsed once so far need to rinse once more and cut into it!
The tank measures 12"x20" roughly should be within a half inch. Here is a screen shot of Feldons calculator I'm going with a 15"x3" stack and 4x1.5" round vents in fire box and I'll have one at top of door. My only ? Is.. How big of a Fb to cc opening do I need in inches from bottom of tank to rf plate? Like I said earlier I will soak the tank over night and get started tomorrow nite on cutting cc opening and the fb to cc opening. This is going to be a fast paced build as it will need to be finished enough to cook on in 3 weeks for a hometown rib comp. at the bar here is the tank before I cut the top off and pulled out the valves.
And some q view of hot smoked chicken I did on my weber