I remixed the original design from alancastell (on Thingiverse) to use magnets.
Magnets are 2x1mm. Just a drop of superglue to keep them in place.
Printed with a Bambu Lab P1P.
Layer height: 0,12mm
Infill: 25%
No supports or brim needed.
Part of my Magnetic Insert for Ark Nova
https://www.printables.com/it/model/467874-ark-nova-magnetic-insert
The author marked this model as their own original creation.