All of your value must be put into an actual base (Base with walls, Set up grinders, etc.) and you cannot spread your value out throughout multiple bases, unclaimed storage vaults basically inside of ANY container, (chests, trap chests, dispensers, droppers etc.) also in echests, inventories and alternative accounts. You are allowed to keep the spawners placed in different boxes as long as all of the boxes are part of the main base. For more info about the boxes read (Base Buffer Rules No.6 Value Spreading).