If you don’t know why an anti-snag mount is a good idea for BASE or skydiving, read this post first.
Homemade anti-snag mounts
Some help to build your own
Download a template for the PE sheet snag protector as PDF here. Print it out and then cut the shape from some plastic sheet (2mm PE-HD works best for me). Warm PE it with a lighter along the your marks and bend it around the camera. Try it out with stiff paper first to get the right location for the bends.
Download luron01’s 3D printable mount here (round surface) and here (flat surface), or order it via sculpteo. Please read the included README textfile, you are free to share those files, but the copyright owner (luron01) does not allow any commercial use! (Link to the original thread)