Can I fit dummy 3-link or screw couplings to the Dingham hooks?
You can fit them to the hook with type 1 latch by drilling a hole through the hook in the right place. I didn’t etch a hole because I reasoned it would be redundant as far as most users are concerned and also might weaken the hook. You cannot fit dummy 3-links to either the hook with loop or hook with type 2 latch because it would prevent the coupler working.
