If tightening does not work, go to Home Depot or lowes and grab 2 star washers. One for each side. It worked like a charm for me when I was having the same issues. I now have to loosen the screw, almost all the way out, to tilt my iPad Air.
It's a great fix someone on this forum recommended for me.
Good luck and let us know what you do
*the washers will go between the 2 plastic pieces. The one your iPad is clamped to and the arm that bolts to the controller.. If you need pics let me know and I will take some.
Sent from my iPad using PhantomPilots mobile app