After a lot of research, looking at other builds and taking inventory of what I have to work with, I've settled on a design for a horizontal reverse flow smoker. Got a little work done today to get a feel for what it will look like. This is it just kinda sitting together. The left box will be the fire box. I will cut the tank and insert it about 5in. with an outlet for smoke in the top, right side. There will be a bulkhead inside the tank that will continue from that right side of the firebox to divide the tank. Above the firebox will be a warming chamber with it's own door and two grates. I'll probably put a stack and damper on it to help with temp controll and a vent from the smoke chamber if I want a little smoke in there. The right hand box will be saddled 5in. for the tank to rest in. I'll use it for supplies or wood. That hole in the front of the tank will be filled along with a couple others. There is one hole on bottom by the fire box that I'll try to use as a drain for the drip tray. You can see the chalk lines showing about where the two doors will be. I'll use fire brick on the bottom of the firebox and probably on top of it inside the warming chamber it minimize the heat in there. Well........that's it so far. Any comments or suggestions?