Climbable Ropes for Create Aeronautics Mod 1.21.1
MODHold a chain-rideable item (Create's wrench, same trigger Simulated uses for its strand zipline) and right-click a plunger rope to latch on.
Hold a chain-rideable item (Create's wrench, same trigger Simulated uses for its strand zipline) and right-click a plunger rope to latch on.
Sneak (SHIFT) -> let go (drops you wherever you are).

