hmm thatís a good point, I forgot about space limitations on the knuckle.
I had my caps tacked and I broke one side at the ears, probably from the ball joint failing. But the other side stretched far enough to oval out the yokes and pop out a cap. They are bad enough that I can see day light around all of my caps and their only held in by the tacks. I was hoping that these would be a cheap way to keep the ears from stretching.