Remake: I significantly reduced the grid density to make the model small enough for easy editing in Tinkercad. To facilitate printing with PLA material and ensure that the spring was completely located on one side, I rotated the model by 5 degrees for half-cutting. Since the spring didn't print well with a 0.4mm nozzle, I slightly increased its thickness. Perhaps this reduced the vibration noise of the spring? Although it still makes a slightly disturbing sound, I'm not sure if this is the sound it was supposed to make. After printing the two halves separately, I first
The overall sound quality isn't very satisfactory, but if you place the instrument sideways and try to cover the sound holes at the bottom, the tone seems to improve. For the appearance and sound effects of the finished product, please see: [https://youtu.be/tho2PT0T7w4](https://youtu.be/tho2PT0T7w4)