RE: Safer EZ-Connectors
I use them on 60 sized and smaller on flight controls. There have been many occasions after a crash where the servo arm broke and the quick link was still attached. The metal disks are what you want to use to hold it to the servo arm. Bigger than 60 and up to 120 sized get clevises on both ends. Giants get heli type ball links screwed into servo arms and control horns.
Edwin