I have been thinking about the spherical structure strength.

The original idea was to screw the orange rings to the grey triangles blocking the white circles between them. Moreover the orange rings were also designed to be screwed to the white circles.

Now that I have the parts printed I'm not so sure the orange rings will be strong enough.

I'll go back to the design board and modify the inner parts to provide the sphere structure and reduce the orange ring to simple covering without structural functions.