Hi. I am building a vertical smoker with a firebox on the side, all in the same cabinet. Day 1: Brought home some metal and started cutting and welding. Basic frame, 50" x 43" x 30" Fire box will be on the right in that smaller section. Here is what it looks like right now: Pile 'o steel: Cutting mineral wool with a steak knife for the tubing: I found I needed to use a broom handle and a large washer to push the insulation all the way to the end of the tubing. Repeat until full.