A minisax (also sold as a Xaphoon or pocket sax) is a short, straight single-reed instrument. The designer liked the stainless-steel MiniSax but didn't want to spend US$100, so they traced the body from photos and printed their own. The mouthpiece is borrowed from an earlier printed minisax on Thingiverse, and the files for those mouthpiece parts are explained on that design's page.
The designer says the intonation is pretty good, though they weren't sure whether the top holes are slightly off or it was their beginner embouchure, and they asked experienced reed players to test it. Treat it as a fun, cheap way to try a sax-like instrument rather than a tuned professional one.
What you'll need
Printed parts
The minisax body
Mouthpiece parts (see the original printed minisax the designer links to)
Bought parts
An alto or tenor saxophone reed (the designer uses strength 2.0, the softest they could find)
A ligature: the page doesn't say how the reed is held
