Simple tray to hold the cards and boards in the game CATsle Builders by Yozaemon Matsumoto and Fukutarou published by Fukuroudou. Fits in the box with the cards (yes, there is room for sleeved cards) split into two sections with the carboard boards split into two sections underneath. The rules fit on top or underneath the tray - your choice - but it's easier on top so the tray does not need to be removed.

The idea behind this insert was to keep it simple, have everything easily removable, and hold all the components available for the game. I spaced the finger spaces in the center of the tray to allow removal of cards and boards with the tray still in the box.

Enjoy! The game really does not need a box insert, I just like having one anyway.