There are times where I did not have a need to put my GoPro on a mount, instead I just wanted to put a string/rope through the holes of the GoPro case. But once the string was on there, it took longer to untie it than it would to just take it off of a mount. So I figured, why not make a mount that had a hole on it where I can put a string through it and leave it on there, and then can easily take off the mount to then attach it to another mount.
I used a 550 Paracord since it is strong, small, and not too expensive. So I made the hole a tad bigger than the paracord (0.20" to be exact) to give you an idea of the size of string/rope that you can use.