Phone Holder for Keyboard

Phone holder to attach to a technet bluetooth keyboard, should fit a 7-8mm phone, just about manages a small tablet at certain angles. Wanted it to print as one piece and wanted it to be adjustable.
Added notches to original hinge so it would lock at different angles, this sort of works. It took a bit of work breaking it in to get it to move free enough, but I also don't want it to move too freely and not hold up the phone. Might have to think of a better way to do this as it might get too loo