Yea I agree it popped in my head while I was at Lowes and that’s what they had. I will work on it and post updated info. I think I want to turn it vertically. Also add some type of adjustable vent at the end to regulate airflow. It just popped in my head.
12" tube in two hours is a lot of smoke. Too much for me and so many others. To help cut down the amount of smoke, fill the tube up just half way vertically, then turn it over on its side (horizontally) shake it end to end while covering the end with your hand. It will end up with the tube half filled while laying horizontally.
This does not affect the burn time. Just helps reduce the amount of smoke. Experimenting as what tbern was suggesting is a way to go.
I did this last summer but it always stoked into flames with such a wind tunnel and twice the fuel vs the maze. I couldn't walk away from it and be confident. Way too much smoke for me so I had to pull the burning embers in the tube smoker out the alum tube so half the smoke vacuumed into the smoker and the rest floated away and to reduce flare ups. I just pulled the mailbox off the Mes 40 and two bricks on the long edge were the perfect height. Plus the maze was lighter smoke.