This model is created from two parts - BOTTOM and TOP. 

12 magnets (5mm * 2mm) needs to be used inside the BOTTOM.  

You can choose from DIAMOND/PRUSA top part.

You can connect these two parts with glue for better strength. But it's not necessary !

I used 0.4 Nozzle, 0.15 mm Layer Height, 20% infill 

Printed fine without any supports on MK3S. I used Prusament filaments.

If you have any suggestions, please use the comments section below.