A friend wanted one with more clicks and stronger magnets and to not worry about the magnets working themselves free, so I changed the models as necessary. 

For best results, the bottom should be printed “magnets down” so that the single layer that is covering the magnets is a good, solid, smooth sheet of plastic. As such, the edge will need to be supported. As you can see, the result works great. 

Pause the print at the appropriate layer to insert the magnets and allow resume the print. The 3mf file already has the pause inserted. It's between 3.4 and 3.6mm. You will need four 8x3mm round magnets. Be sure to flip the magnets between installing one in the button and the other thee in the bottom.