Qidi Tech 1 fan duct components

thingiverse

I separated the FB fan duct into individual parts at its base, effectively creating two separate pieces. This enabled me to print the upper section with robust support structures, remove those supports afterwards, and then combine the parts by gluing them together to form a sturdy complete item. The original designers deserve credit for laying the groundwork, as their initial work is available here: https://www.thingiverse.com/thing:2532869.