Recently finished modeling a train whistle to look like those wood ones I had back in my childhood. Spiced it up a bit and it sounds great. I’m very pleased since my first test print worked perfectly after in the past having to print and re size my models very often. Huge achievement for me as a modeler to say the least!
If your interested in printing this out here is a link to the stl. https://www.printables.com/model/456661-choochoo-a-3d-printable-4-tone-train-whistle
Only took 3 hrs on my P1P but other printers it seems to be about 7 hrs.