A way to mount https://www.amazon.com/gp/product/B0BN8F8M6D (Motorcycle - style metal phone mount) to the Miata's dashboard. It removes the articulation (ball joint) for a more low profile, rigid setup.
This takes advantage of the mount having two M3 threaded holes to attach to.
Uses two M3x12 socket screws.
Some use cases:
The author remixed this model.
Blanks out the existing mounting hole and replaces it with two M3 sized holes for socket head screws. It also adds a small bump so that the phone holder's moving parts are not binding with the supports.