hi @blorg
it's amazing how big this place is !! surely sooner or later you will find what you are looking for !! congratulations for the very detailed tuopost and for the beautiful photos. it makes me a little impression that it is underground. Is it a lot of people who spend their time there?
but how do you make a message with knives ?? !! did you try that?
congratulations on your curie vote and thanks for sharing with us