I adore the spooletarium by M4NU. When I was printing the spools that serve as the frame, I thought that I might save some plastic and time by cutting parts out of the spool, and I was really pleased by how the result showed off the internal workings. Please note that this is a remix of the NFC spool, and works with the Spooletarium NFC set.

No supports are needed, but I advise using a brim.