My own design of a tripod mount for a GoPro camera. Has a hex hole in the bottom for a 1/4-20 nut and space above that for the bolt.
I printed with 50% infill to make it strong and 4 perimeters to reinforce holes.
***Update 10/18/15
I added "Custom Quick Release.stl" per a request. It uses my newest tripod mount design (more meat so much stronger design) and attached it to a Cullmann 2800 Universal Tripod Plate. I got the mount info (used for size) here http://www.thingiverse.com/thing:626146
The author marked this model as their own original creation. Imported from Thingiverse.