Thanks B.H. & everybody else: and here's the BUT,
Does the autobrkae system consume more hydraulics than (I hate to use the term 'manual brakes' for feet) foot brakes? In the event of L. or L & C system failure, 2 x size 11's are going to do the job of autobrakes and cane the R system. Do I expect a problem? I doubt it, or rather I don't know; so does the auto-system use more power? That's a new one on me.
I must get out more as the handicap is soaring with the birds.