GoPro SJCam snorkel mask adapter

Here is an adapter for attaching a GoPro or similar camera to a US divers snorkel mask.
The camera in the pictures is a SJCam 4000.
It uses (2) 3mm x 30mm socket head stainless bolts and lock nuts.
Use the original thumb screw and nut that comes with the camera to attach.
The outer piece have built in support tabs that are meant to be broken off with pliers. They were needed to keep the radius nice and round.