anyone can advise where to get the Micrometric screw?
No one has found a source for a micrometeic screw so far afaik.
The best looking mod I recall was performed by Bozz consists in breaking the screw in two parts so that the upper part sticks out a little and the bottom part touches the dagger. Acceptable considering the whole swan neck device is just cosmetic, but a very difficult mod to perform if you ask me, considering the tiny parts involved.