Customizable GoPro Knob

There's plenty of other GoPro knobs out there, including other customizable versions.

I made this design because (a) I wanted to use the specific length of M5 bolt (25mm) that I seem to be able to easily find here in Canada and (b) I wanted to play with different grip designs.

By default, a fairly standard grip is generated (which, while having a different design, still works with a GoPro wrench).