Time 1, If that was my smoker, I'd take the elbow off the exhaust.
My thinking is that could limit the draft.
My UDS uses just the bung hole with a plate on a pivot bolt.
I can do low an slow, hot an fast.
I hope this helps.
Ron, 1 little Chief top loader, 1 UDS (90% built) 1 mini UDS (in plans)