I had a house inspector look at my house before buying it. What no one noticed before I moved in was that the heating duct to the far end of my house had the heating duct removed, so very little hot air was getting to the far end of the house. When I renovated the basement I bought ductwork from Don Park. they have a huge selction so I was able to get whatever I needed. Installing ductwork is easy in a new build, but I wanted to keep as much framing and drywal intact as possible, So I cut through where necessary and left the wals standing. Next time I will know that it is difficult to fit an 8" duct through an 8" cavity.
The only real issue I had with Noble is that the store is self serve, and if you are not quite sure what you need, it takes some doing to figure out.