Here are some images with the configuration (Finally!) of the roaster, and the problem seems to be the design of the machine itself. The only inlet for air to provide convection for the drum is a tiny, 1/2" hole in the side of the air channel about level with the burners. Please note the...
1000 words, coming right up. Please note the blackening on the side and funnel, this is where the smoke is pouring out, rather than the exhaust. And the plate on the back which is very similar to Gila's.