Hmmmm
I guess I am not following you on the ball link issue.
Those are similar to ones used on helicopters for decades ( I have been using them since the 70's.
There is no lateral force that would cause the link to " pop " off. Nevertheless if you are in the least worried
then place a washer between the head bolt and the ball and that sucker will never depart.
Its a non issue for me. Check out the smack down, hard 3D that heli guys do with those links.....!!!
Cheers
Dean W.