Use it like it's designed. All I'd do is rig up a way to manage the air coming in the bottom so you can control the temp. I modified a couple of them for friends. It works just fine for the money. Also, fill the water pan 1/2 full of sand & cover it with foil. Cheers!!!
If Homebrew & BBQ aren't the answer, then you're askin' the wrong questions... Cheers!!!