Thought Id share this quick video I made while I was getting ready to clean up some ducts I sold with an ac and heater box on ebay. For any guys that might be getting ready to mess with their factory ac, the distribution or diverter duct often has an issue with the door. Its the most expensive duct to buy new and something you wanna look out for when buying an original.
https://youtu.be/pXRU9leCD84