411A, you might chime in being the L1011 expert.
I believe hydraulic fusing came in as a result of the Saigon C-5 crash where an aft cargo door failed and took out all four systems. The Galaxy had fuses everywhere and never lost more than two systems in my knowledge. The 1011 pilots, in my experience, said the L1011 was like the C-5, but perfected. At Eastern, the L1011 was U/S so often our cleaners wouldn't hustle a job on it because it wasn't anywhere in a hurry, but the -9 or 727 at the next gate was leaving.
I would agree on the lav system problems. The C-5 lavs were right over the landing gear logic panels, the inevitable leaks cause all kinds of unpredictable gear problems. Also, I don't know if it was Dynatube, but the swedged hydraulic fittings were a nightmare. Not always capable of being repaired except at C-5 bases and not always then. I blew a #1 system pressure line just inside the fuselage over France. Filled the cargo area with hydraulic mist and fluid, landed back in Germany. Before undoing my seatbelt, the hydraulic folks were talking about a 72-hour repair. They were right, too.
Dreary stories, but the 1011 and it predessor were magnificant techological marvels...........WHEN THEY WORKED.
GF