I am truly thrilled to learn that the Duct is component that will actually be doing something. During my Model Making days I gained a lot of satisfaction from the long hours of work but that was/is equaled by making a useful special purpose bracket for a bike [bicycle] in less than a couple of hours.
I have spent a few years working in the Sahara and West African Tropics, and humidity dictated how most coped during the most oppressive seasons. This is being typed now, early hours of the morning, to avoid the heat and humidity. Fortunately I fair better now than I did as a youngster. I can only guess that your climate is drier but obviously still problematic on occasions?
S3D is a means for me to keep mentally active, I scan the Forum and when something appropriate crops up have the urge to learn. Not everything triggers a full response but anything of substance is investigated to the best of my abilities.
At present I have no plans to venture into 3D Printing, there is a ‘queue’ for the cash and a lack of space, However printing Screw Threads is of interest and ‘feelers’ are out seeking information and experiences from anyone who has anything on the subject to share.
I have just started a ‘Thread’ about Screw Threads in case you are interested: