About this 3D model
I have made 3 types of trackers: squares on both sides, shields on both sides, and a square on one side and a shield on the other. Each type has 5 different variants: 1 hole, 2 holes, 3 holes, slot, and smooth. The holes can be used to insert numbers, while the slot can be used to insert a miniature. All trackers have a 1mm gap on both sides for inserting a piece of paper. Can be printed without supports. I would print different colors, to further distinguish between friend and foe.