This organizer makes it easier to store the game with sleeved cards and beef up the coalition block tray which was an accident waiting to happen. The sleeves I use are Arcane Tinmen Non-Glare. Other brands may or may not fit. Please note that the bottoms of the player trays are very thin (.7mm) to prevent lid lift. Make sure your slicer is set to lay down at least 2 layers and your bed is carefully leveled so these don't print out too flimsy. Also note that the dials need to me loaded in a specific way. See pictures for details.