The nav is completely worthless. Im thinking about mounting a MagSafe phone Mount right on top of it. It would adhere to the front of the screen. But I知 still wanting to be able to detach it at some point and hope for d be able to wipe off the leftover adhesive.

 

It's plastic.

 

You could try first sticking on a glass phone screen protector, which shouldn稚 leave any residue, and then stick the mount onto that?

(caveat: I致e never tried sticking a screen protector to a plastic screen; ymmv :-)