Replacement Christmas tree ball holder

I have a set of plastic Christmas tree balls, that go on a tree in the garden every year. After more than a decade the holder parts at the top of the balls become brittle and start to fail.

This model is a replacement part for that holder part.
It is printed in PETG in the hope that it will withstand the elements (temperature, wetness, sun light, etc.)

The SCAD file references the library af-basics.scad which can be found here: https://www.printables.com/model/175914-openscad-library-for-more-basic-shapes
(Any version should be fine.)