Swichable Permanent Magnet
You can find a video about this here https://youtu.be/AygyCYMVXlI
and to finish it you will need 12 x M12 nuts, 12 x neodymium magnets 10mm by 5 mm round and apiece of 8mm rod
You can find a video about this here https://youtu.be/AygyCYMVXlI
and to finish it you will need 12 x M12 nuts, 12 x neodymium magnets 10mm by 5 mm round and apiece of 8mm rod