Universal Seat Back Mount for Rivian R1T and R1S

Need some type of adjust For the threaded part.

The mount is good but, I’ve 2 problems - 1) the metal is too rough on my seat fittings, it scratches all around, 2) The threaded part needs some adjustability, as all the mounts are not threaded the same way and the screw is welded. There is now way to fix the orientation of the mounted iPad holder, unless you keep guessing how many O-rings it would take to make the stand 90°