These ball ends are the best. If you want a slop free linkage system then look no further than these ball ends. We use these ball ends exclusively on our F3A models for this very reason.
Note, this is the ball end only. No hardware is supplied.
They are:
These particular ball ends were used on our Allure in conjunction with Ralph Schweizer 2.5mm titanium linkages on both the the ailerons and elevators.