New build. Firebox and venting

[The Hillbilly Smoker]

Just finished this build, and am tweaking to obtain best smoke flow. I have already discovered the Masterbilt smoker attachment is woefully inadequate. I am swapping it for a Smokai 4 litre unit. I have a rear 3" chimney, from a pellet stove mounted on the rear of the structure. Will I need additional venting? If so, where would y'all make the holes? The dimensions of the shed are: 8' wide, 7-8' high, and 6' deep. Please find photo(s) attached. I welcome and covet your suggestions. Cheers, Anthony.

3 new items by Anthony Kimber

photos.app.goo.gl