[Erich] reverse-engineered a disk and found the polarity using magnets (natch). Then got to work designing a replacement with cavities to hold six 1mm x 1mm x 1mm neodymium magnets and printed it out.

The company describes itself as “a link in the circular economy by offering a green metallurgical solution through short loop recycling of neodymium-iron-boron (NdFeB) magnets to secure and diversify ...