Finally got enough fluid pumped in and enough air out of the lines to hold a steady level at the Mezzinine Reservoir.  Currently all four pumps are running in servo mode at 19psi; this drives the output to the motor at a little less than 3/4 of the max.  This has been the state for a little over an hour.  I just checked the Mezzinine and the level remains constant and a thorough check of the LVEA reveals no leaks.  The system will throttle back if a block occurs and should not see any pressure spikes; it will shut down if fluid levels drop too low.