This is a ring puzzle

The thin ring in the stl- or 3mf-file is only for pisitioning, the slizer should ignore it.

Update 06.12.24:

There is now a profile, prepared for magnet.

If downloaded the profile into Bambu Studio you can find under the objects a negative modifier.

This negative modifier could be adjusted in size to fit the magnets.

See also the pictures in the profile.