We've upgraded our Link so it's made from Grade 8 steel with extra side ribs at the 90 degree bend for extra strength, and we've added a C-clip to the Spring Bolt so that if it ever loosens up it will never fall out.
It's easy to install, just pull the clip off the groove, assemble the C7 as you normally would (see C7 Tech Diagram for more info) and then snap the C-clip on.