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Exacto knife on the vent registers. Dremel for reducing the register ducts to 1/4" above the duct insulation (was 1" above).
If you use a borescope to look down the duct work, I saw some of mine were compressed. I still have to figure out a way to open them up to their normal height. Maybe insert some vinyl J channel flat, then turn it up vertically?
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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