Monkey-man: Waveguides for speaker enclosures should be easy in MoI. About all you should need are lofts or sweeps, and shell commands.

I 3D print mechanical parts & assemblies so it's a good fit for MoI. I have also used threaded brass heat-set inserts in my 3D printed parts to fasten items together with machine screws. That's something to consider doing if you need to print a large waveguide in sections, or need to fasten one to a wood enclosure.

Ed Ferguson