PS. Harry
"the many tasks facing engine fitters on their lofty, draughty perches, from which tools were only too easily dropped - a nuisance to retrieve, and also a potential hazard to anyone below".
Mother (92 yr. old ex FAA Air Mech E) says that her mates working on Sunderlands or Catalinas bobbing about on their moorings always tied their spanners (or whatever) to their wrists as retrieval was impossible if dropped.
Ian BB