Centrifugal Force Puzzle

This is a simple puzzle design I remember from my childhood.
The three pieces slide together to form a circular disc. See this video https://www.youtube.com/watch?v=zrF1JjCRyI4.
To separate the pieces again, you can insert a pencil or something similar into the center hole and turn the disc counterclockwise: it will fall apart immediately!

The model is fully parameterized, see the included OpenSCAD file.
For me a horizontal part separation of 0.5 mm worked best; 0.3 mm resulted in very tig