A buddy made one from an old vertacle air compressor tank. About the same process and size. He cut a door out of another piece of steel and bent it to match the curve and mounted it with hinges, then cut a hole slightly smaller than the door. Instead of racks, he installed hooks inside and hung what he wanted to smoke on hooks. he drilled a few air holes on the bottom and top. He made plugs for the upper holes from wood and just plugged a few of the holes if there was too much draft.
I have an currently unused outdoor boiler and thought about trying to convert that into a smoker by stacking some racks on cinder blocks inside the fire box and installing an old fashioned wood stove draft control on the exhaust.
I have an currently unused outdoor boiler and thought about trying to convert that into a smoker by stacking some racks on cinder blocks inside the fire box and installing an old fashioned wood stove draft control on the exhaust.