I recommend printing the planter upside down, using the variable layer height option and enabling supports for the best quality. No brim needed.
It uses three 12x3mm magnets that are simply press fitted. I've used N45 magnets and the adhesion is very strong! You can probably use weaker magnet.
I can change the diameter of the holes on request, just let me know.
The author marked this model as their own original creation.