The author remixed this model.
Remixed to use m5 nyloc nuts instead of heat inserts. I used a piece if tire innertube as the rubber gasket which was less fussy than O-rings but either will work. The rubber piece or O-ring makes the mount way solid.
Also changed the direction of the go pro mount by 90 degrees to work with my bike light application. I made a few different versions for different angles/ mount locations.
I used this to mount my k-lite bike packing light to my aerobars.
I printed in ASA and pteg both work great
Nice work on the original design, professional job !