So back before the board went down I had started to talk and question about building a reverse flow out of a older bbq on a trailer. That idea has now gone out the window and I have the actual project started. My friend was nice enough to donate his old shop air compressor and a trailer to the cause. Finally had the chance a couple of days ago to get the tank into my garage, lay out the door and firebox cuts and start in. Here are the starting pics. Dimensions on the tank are 24" diameter and a length not counting the ends of 48". I think this will make a really nice first time build.