Originally Posted by
jdawginsc
This would be the correct way I believe.
The adjustment is made from inside the claw and the nub that often goes missing just protects threads and sharp edges…
I think.
When you say "nub", do you mean the wider round barrel piece at the backend on the outside of the claw? So that piece is screwed on? If so, how do you actually turn the screw? Is there a slot for a flathead screwdriver on the end inside the claw?
On my Italian bike (2nd pic) it definitely has a slot for a flathead, but I assumed the other two were turned using your fingers on that large head, since it has knurling.