This is just a simple harmonica holder but it should work with most of the diatonic harmonicas. I checked it with my Hohner Silverstar and some unbranded ones. It could even work with different sizes and shapes (It works with my Hohner Puck).

Printing

Just print it with standard settings for 0.2mm layer height. You need two pieces of small-bolt and two hinge-bolts. Three other parts should be printed once. I used PLA but it should work with PETG and other materials.

Assembly

Assembly is straightforward. Just connect everything with 3d printed bolts as shown on the pictures.

Mounting harmonica

Depending on you instrument, It can be mounted just by pressing or you need to loosen the small bolts a bit.