This Campaign 3 insert is designed to be compatible with Mansions of Madness 2nd Edition®, and Beyond the Threshold®, Streets of Arkham®, Sanctum of Twilight®, and Horrific Journeys® expansions. The design provides both efficient storage and improved game play. The trays can be utilised during the game, and they greatly aid set-up and clear-away times. The insert is arranged in three layers with the room tiles stacked in the top right corner. There is a vertical small card tray for the common item, unique item, spell, and condition decks. There is a separate tray for the damage and horror cards. All the card trays provide for sleeved cards. The other trays shown here are for the person tokens, dice, search/interact, explore/sight, and other tokens from the expansions. Miniatures are stored separately from their bases, and grouped by type. The large and medium monster trays have no base and are meant to be left in the game box. There are then trays for the investigators and the small monsters. The small and medium monster bases are stored in the large tray shown, which also has a slot for the medium and large monster tokens. The other tray here is for the investigator cards and the room doors and barricade tokens. This last tray also has slots for the ID tokens and the pink clue tokens from Beyond the Threshold.The larger room tile and rules are placed on top of the insert trays acting as a lid. The game can be stored vertically, and transported easily as it fully fills the game box. This product consists of a flat-pack of 8 Evacore sheets. The trays require assembly, which is quick and fun, using ordinary PVA glue. Detailed instructions are included in the package.