Can you check this alignment before I final-tighten it?
Do not
Do not lock duct down while it is twisted, leaning, or forced.
Why it matters
Once fastened, small alignment errors become leaks, stress, and ugly finish.
Search words: measure layout verify alignment plumb level final fastening alignment plumb level final fastening alignment foundation field duct not level unlevel out of level crooked duct plumb level alignment final fastening