I just picked up a string swing to display/hang my guitars on the wall, and I didn't like the end caps that came with it that required sticky tape to fasten in, so I created these printables that will not leave any glue residue. They just slide (tight fit) into the side, and can be removed fairly easily if needed.

I will be making many other string swing accessories in the future, but this was my first. (and my first freecad project as well)