Really simple knobs with magnets for the CORE One top cover. Remove the rivets and you have quick access. You dont need the rivets any more.
Place on the 4 screw at the corners to hold the top cover down.
Magnets size 8 x 3mm
Simply press the magnets firmly in. Push them fully in. They hold perfectly. If they're too loose, attach them with a drop of superglue.
Update: New version with hidden magnets.
The author marked this model as their own original creation.