I've been learning how to come up with custom parts, but failed to back up the original 1.5W & 2W radius elbows for duct.
I'm also wondering if there are guides (because I haven't found any) that show you how to create custom parts. You see, I need to create custom elbows where the throat must be adjustable. I created a part where we have the standard 6" throats, but can adjust from 2 - 6. Now I need one side to be 6 and the other 25ish. I'm trying to save sheet metal by having the elbow made as one whole piece with a bottom tap.