In a game I am working on in ADV3, I have a rope that can be climbed. If the rope has been tied to some Fixture and has been thrown or lowered to make it climbable, I allow up and down to mean Climb the rope. I got this by modifying the TravelAction.execAction to replace the action to climb the rope if its climbable or just let the TravelVia handle the travel.
I did a quick test with the Lite library, I was able to redirect up to examine me using a similar modification. You would just do the checks and replace the action, if necessary, before that While loop that moves you out of your booth. It works I’m just not certain if this kind of hack is worthwhile for just a single flue.