One suggestion...I did this with my patio offest ( New Breaufuls). Pick up a section og water heater flue pipe (I found mine at a big box home improvement store, i./e. Home Depot/Lowes) and add it to the stack. This will help the airflow thru the smoker. For me, two drew too fast, but with one, it did pretty good. It is the ventura effect. I also do not use the flue damper. I control my heat directly with the firebox intake dampers. If you try to chock back on the flue damper, it slows down the draw and the smoke can cool off and condense. This created creasote that can drip onto your food and give it a bitter taste. Just my

, YMMV