oddly your question shows in the email i received but not here. You do not need additional interface blueprints, you just need to change the item’s name, so in my example for the keycard i use an overlap that calls add inventory and adds an item “keycard” class this as a unique identifier for that keycard, so another keycard could be “keycard2” etc. then in the door an overlap calls check inventory, in my example it checks for “keycard” which was the identifier i gave to the original keycard, so if there was another door for the second keycard (keycard2) then it would check for “keycard2” instead of “keycard”.