The stainless piece is something unique to the 32, mine is a 23, and I don’t have anything like that. It sounds like you nailed 250°, so stick with that. You can pretty much go as high as 400° ish without adjusting the bottom differently. The top is the only adjustment you really need as far as maintaining any temp. Opening the bottom mostly gets you to higher temps more quickly. I suggest you start with a full load of coal, set your bottom vent where you had it, and experiment. This requires some time, and some beverage of your choice, and something forgiving to cook, if you care to. Sent from my iPad using Tapatalk