CQ, I too am building a rf out of 3/8 wall pipe. Question is when you cut your CC door did it spring? And how did you straighten it out?
Have been reading this thread and love it! Thanks for the frank answer on insulating the firebox. I've been considering it in my build and you just made my mind up for me.#1 - i wont insulate another one. It does help but with the extra cost and work that goes into it, in my opinion, its not worth it. But i wanted to go all out on it and so i did.
#2 - i did that cause i like the look of it and it made it so i could use the entire length of the CC for cooking space and it wouldnt interfere with the door opening. I like the box better then just welded to the end or making a 90 degree out of the pipe.