My first thought, as I read from your Problems was, that your duct-running is too short. One advice that I heard from for a ventilation was, that the duct-runnig has to be at least 5 feet for a good effect. Perhaps it may be the problem?
The second thing for me is, that the hood is a little bit too high above your workbench. It could be a little bit lower for my sensation.
In spite of everything: I love your wahtube-hood since I see it the first time!
Thank you,
Barbara
(Please forgive my syntax, english is not my native language)
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