Hello everyone. Meat Hunter here with a question on wood smokers. I having some steel rolled for me to that will be made into an offset smoker. 4' long by 24" wide. I just came across a 3/8" thick stainless steel pipe that I thought would be nice for the firebox but it measures 14" wide by 20" long. Is this too small for the size of the smoker itself? Or is it best to have the firebox a comparable size to the smoker? I believe I read somewhere on here that the firebox should be the same diameter as the smoker. Thanks.