Summary

Designed so that sheets of flat transparent plastic (e.g. acetate) can be inserted between the two layers of the lid, and into the windows. Cut three 98 mm X 52 mm rectangles for the windows, then trim to size. For the front panel, I recommend printing one of the lid frames first and tracing around it on your plastic.

Uses six disc magnets (e.g. Magcraft neodymium-iron-boron rare-earth magnets, 1.6 mm thick X 6.4 mm diameter) for closure.