ball n socket screw phone support

thingiverse

The design was still not wide enough to be stable, so the head of the screw held onto tiny tag pieces printed separately and fell off immediately. The fit against the back of my phone was just not right. However, if you use a thin grippy foam rubber on the disk that touches your phone, it works even better. I've got loads of sold-out drone lipo battery foam to keep them from sliding out of the straps.