I have a small light vertical smoker that I got for Christmas and I have gotten addicted to smoking. I want to build something bigger. I've read several posts on here including the in depth tutorial. I have two old air compressor tanks, one 80 gallon and one 60. I'm thinking use the 80 for the main cooking chamber and the 60 attached with the lower portion being the fire box and the upper portion for a warming area. I have a few questions though. I know the rf plate needs to be angled and have a drain, but how thick should the plate be? The way I've got it drawn there would be about 4" between the rf plate and my cooking rack. Is that OK? Would the smoke stack work the way I have it drawn in the second picture? If I put an opening from the main cooking chamber into the warming area could I cook in that area? Any other thoughts or pointers are greatly appreciated as well.