This is a frame mount for the Gopro Hero2 and Hero HD (yes the old old one).
I needed one that would give access to the hero port for long timelaps shots – the other ones I found didn’t grip the camera quite well enough for my needs, but most of the dimentions were taken from Mickeshobbys thing so thanks go to him for the base!
The files for my version are available on thingiverse for you to 3D print at home. Look up thing: 2556651 or click here to see the item page.