So I have an 80 gal air compressor tank that I want to build into a smoker. I was looking on the custom build thread and saw the pics of peoples custom builds.I noticed that some had the smoke stack opposite of fire box like the one I have at home and others had it on the same end. I thought it needed to be opposite to pull heat and smoke across the meat. I've seen the term reverse flow. So #1 Whats the difference, which is better? #2 Does the fire box metal need to be 3/16 or 1/4 inch steel? #3 Diameter of exhaust stack ? I'm sure I will have many more but these will give me some starting points and get some thoughts started. Thanks in advance for any help!