you may want to consider getting rid of the metal dog bones and get some of the coated wire rings instead.
I about took my crew's teeth out with the metal dog bones when coming in off the wire and releasing it too fast! It flew up and hit him in the mouth...twice!
Ahh, but that can't happen with the system in the picture (my boat) while it can happen with the more conventional system. With system in the picture the dogbone is always pulled both sideways and downward, never upward. It can't fly up as with the more conventional system.
Wouter