Captain's log for the gear-failure pass: one zombie lcxl3-driver holding a
stale binding to an unplugged mk3 explained three of PLN's five symptoms,
the fourth was a mislabeled tray button, and the fifth was tooling that
had been running invisibly all along.

Written for mining later — the sharp bit is that name-based identity is
the actual bug, and it caught the investigation as well as the rig: a
subagent grepped aconnect for LCXL3, hit the driver's own phantom virtual
port, and reported the hardware was back.