I made it fancy----drawing light inspiration from Italian wrought-ironwork to further invoke the Renaissance. Other than that, this design makes no sense.
Divided it into three parts, because I'm using a teeny tiny MP Mini-Delta printer. Reworked the attachment mechanism; beware, the interlocking pieces are designed for a tight fit, so some filing and shaving-down with a razor blade (I personally think "snap knives" are one of the handiest tools on the planet) will likely be necessary.
Support structures (only touching the build-plate) might be necessary on the first piece, the piece that actually produces sound, because just inside the whistle it has a 50-degreee overhang. I could have fixed that in Blender, however did not because I was afraid to tamper with the internal length of the chamber, which would probably make the pipe's tuning flat! D: I used concentric-pattern support structures on my personal print, and they came out of its center perfectly-----like an apple-core!! xD
UPDATE: I'm not a musician, so I have no idea what I'm doing with this thing (and that's the whole reason why I'm printing instruments----to finally learn!!) but I'm starting to get the hang of manipulating its pitches, and IMO it sounds beautiful. Well done, Mr. PFH, whatever your username stands for... Its natural tone sounds nice enough all by itself that I don't feel like an idiot playing with a screechy toy as I try to figure it out! I'm a very quiet person who doesn't like to bother other people with a lot of noise, so that makes a big difference in how much and when I'm willing to practice with any given musical instrument. Its sound is naturally sweet, so I don't feel like I'm being rude. :D Just commenting on its sound-quality for other Thingiverse perusers who might be contemplating PFH's assortment of tabor pipes. When I feel brave enough to perform with mine, I'll attach a demo video here..... That's probably going to take a while......
Push Plastic PLA
Piece #2 got knocked off of the build-plate TWICE for me, so I adapted by giving it this enormous 'sombrero' of a brim, to help it hang on. The taller a printing model, the more leverage it has against the build-plate! It still almost came off a THIRD time, at the very same point: where the top arc of the 'heart' closes. I heard the printer's nozzle scraping the print before it was too late, and paused the print in order to 'level' the top of the model with my trusty razor blade. So, just watch your printer closely as it nears that point. It could make all the difference between grief and rage, or joy and music!!