Simple Magnetic Counter Dial

I can't see the cubes very well when they are on the Maracaibo board, and when doing combat, knowing how many cubes are out is important. So I created these trackers to help me see at a glance, without re-counting over and over.

To attach these you will need to press 6mm x 2mm magnets in place. This gives a smooth dial action, and the magnets have not separated for me.