Rummy Cup stand
Rummycup stand
You need 4 magnets 1,5 mm x 6 mm x 20 mm to fix the cover to the holder. I glued the magnets with CA glue and activator.
Link to the magnets:
There are two different types of covers with different diameters of the holes. If you have stones with a wide of 25 mm or smaller, you have to take the cover with the small hole.