Need 8 bar magnets 3x4x20 mm (or you can stack any size to reach these dimensions)
Dont forget to stop the print to insert them !
4 for the top and 4 for the bottom part
Inner insert can be printed in another color, you can mix and match.
Work in addition of those spacers
https://www.printables.com/model/1270951-omnihive-insert-for-boulders
The author marked this model as their own original creation.