I make a lot of GoPro mounts and accessories and this is my latest tripod mount. It's been updated for maximum strength with wider yet perfectly fitting fingers. The mount has an inset for the GoPro bolt to seat perfectly. The bottom requires a 1/4-20 nut to be epoxied in place, it's also good to epoxy an acorn nut in place for the GoPro bolt. Print this solid for best strength. No support is needed for most printers, you may need minor cleanup of the holes.