Going to use a conveyor pulley 18" od x 30" long 1/4" thick around 30 gal. for the cook chamber. Planning on making the firebox oversize and was getting ready to ask a question about sizing the firebox to cook chamber inlet size since in the calculator it is based on firebox volume, but DaveO answered my question in this recent thread: http://www.smokingmeatforums.com/t/160281/vent-size#post_1163955 Thank you Dave. The forum has been/is a big help, thank you all.
If there is any interest, will try to post updates on this project. Warning: I'm not very fast. It's a shame that work interferes with pastimes (at least it does with mine). Regards, Earl