Hi, First of all I apologize for my way of speaking, because I am Brazilian and I am using google translator. How I've never seen a smoker up close, I need help building one. I already have a UDS that I build based on youtube, but I wanted a vertical smoker. I need it to be as light as possible, but to have quality for years of use. I thought of making using 1.1/2 "x1/16" square tube structure, internally 1/8" plate in DC and 3/16" in FB and externally 1/16" (rock wool coating) . Between CC and FB 1/4" plate. And FB with refractory brick. I need a 45x35x24 CC. How big is the FB recommended? Does reverse flow for this size help? For the chimney what plate do I use (will it stay inside the CC)?