2020 Extrusion End Cap with screw hole

This is a remix of https://www.thingiverse.com/thing:1876628 for screw mount.


As I do not trust much in glue, I made a version to mount with a wall plug and a screw.
Most of the 2020 extrusions should have a 6mm hole, I had 2 different suppliers where this works well.


Getting good results now with flexible filament I added an additional dome shaped design acting as a damper. I used the following paramemters for a 0.3mm nozzle:

infill Density: 20%
infill Pattern: Gyroid
Wall L