GoPro Ball Joint Mount Adapter
thingiverse
I'm making this thing now, you know? It's a standard GoPro connector with a ball end that attaches to an old GPS windscreen mount, effectively converting it into a GoPro mount. I printed it sideways as shown in the picture for added strength. Using Craftware, I was able to slice and add support under the cylinder part - although, if your 3D printer bridges really well, you might just get away with no support at all.
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