Maybe the purpose is different. Fieles are applied to keep a static position, whereas the screws that fix the jaw screw ought to have the ability to be screwed and unscrewed with a relative easiness. I have checked my set crew to respond to post #22 . It is in a poor condition; i will not take it off again. Its point is worn; i couldn't figure out whether it ended in an actual pin or flat shape. But it all appears that its body has a thread; at least it went out and back in with a screweing movement.
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