Hello again! I finally found a tank that I was looking for. It's a 120 gallon vertical. 30" Dia. I've been doing a LOT of reading on similar (and some not) builds. Thinking and re-thinking ideas. I was hoping someone could double check my numbers and answer a few questions I have before I start cutting? On the right of that pic is my FB/CC opening. I went with 3/16 thick but that's only a guess at this point. I have yet to even drill a hole in it. If I'm thinking correctly, the inside of my FB would need to be 24.458" wide? If I made my firebox 24.458w x 20h x 20d, this would give me 9795.2 cu in. I have a piece of 6-5/16" ID x 39"L pipe. Is this too big? To get my volume correct it would leave me with a 19-1/2" height. I'd like to use it if I can, it's 304 ss. I thought it would look good all polished up! What is ideal distance between RF plate and bottom grate? With a short/fat tank like this it would give me about 8"ish One last thing for now, it gets pretty cold up here in MN. I'm planning on insulating the FB. 1/4" seems to be the norm but would I gain anything by going to 3/8"? 1" insul enough? Please bear with me. I already know this will not be a quick build with work/kids sports etc. Plus the more builds I read about, the more ideas I get! Thank you for any and all help guys! I will try to keep this project going so you don't get bored with it. Thank you!