Printed as follows:
- Plug: 0.3 mm layers
- Cone: 0.3 mm layers
- "Crown": 0.1 mm layers so that the ball joint would print smoothly
Tightening the screw required a lot of turns ... carefully, to avoid overtightening :-)
Plug and crown are superglued into one piece. The thing would work just with screws, but I figured glueing might avoid some creeping rotation between the parts.