Hi all i'm new here to the forum, and I am about to start a build with a 60 gallon compressor tank I found cheap. My question is what would I need as far as fire box size and opening in the cook chamber. I am doing this build on a budget and if possible would like to use another tank for the fire box if possible. Any help is greatly appreciated. I am loving this forum for sure, an absolute wealth of knowledge on here. Again thank you for all the information.