I needed a lightweight and easy-to-print backpack mount for my GoPro. 

It's an alternative to a chest mount while riding my mountain-bike.

I have been using the PD Capture Clip before which I like a lot but it's fairly heavy, especially if you add an Arca Swiss plate with a GoPro mount. 

Also this mount is meant to break in the event of a crash.

The existing M5 bolts that came with the GoPro will work fine to secure the angle mount and the camera itself. You'll also need 2 M5 nuts.

I added a layer of stick-on rubber to the back plate so the whole assembly wouldn't slide down the strap when riding gnarlier terrain.