I finally got my 160 gallon project somewhat finished. Well not finished, but it cooks :)
However, there is a weird temp problem, the firebox end is considerably cooler than the far end! I though it's usually the other way around ;)
All the openings have been made according to Feldon x 1.5 / Daveomak calculator, and I don't think I have any airflow issues.
However my doors are very leaky currently (and I mean very), so I'm wondering if that could be the culprit? Maybe the hot air coming under the RF plate leaks out from the first door and cools down when it reaches the FB end. RF plate is a bit hotter on the FB end, I cleaned it and got most sizzle from that end.
The tank is 78" long and 26" in diameter. Disappointingly it's only 1/8" thickness, but I don't think that's the problem.
Otherwise it cooks great and I can fit more than 100 pounds in there at once :)