It is my first model designed with OpenSCAD.
Check out my other postcap designs: https://www.printables.com/de/social/256636-seemomster/collections/185470
The 5 parameters are shown in this technical drawing.
The bulge_factor is the factor by which a sphere is scaled in z-direction to receive the top bulge.
Supports: No (bridging works fine)
Resolution: 0.1 mm at the bulge and 0.2 mm below
Material: PLA
Infill: 20%
The author marked this model as their own original creation.