Hello, it's been a long time since I've been on here. I have been thinking about building a third smoker; first was an offset, second was a UDS. Well, now I want to build this thing...except out of oil drums. The main reason(s) I want to do this is because I would like to have propane available (if needed for weekday grilling) as well as a second chamber to create one giant chamber (when needed) to smoke whole hogs/ lambs/ chickens on a rotisserie-you get the idea. So I understand all that needs done, it's relatively straightforward. However I am not sure how I would connect the two oil drums so that I could have them separate or combined when I want (some sort of separating piece that could slide in and out). Also, what should I use for the fire box? Have any of you done this or know someone who has? I would love to get some insight/ ideas/ tips to make it easier and not so expensive.