I designed and built the GML/Nova sound system (consoles, x-overs, processors, amp racks & cabinets), and worked on the shows. The main guy I remember, Mark Linett, may have mixed the Los Angeles show. At some point Lon Newman took over, but I forget when.
I remember trying to build a different kind of system, and I was really hoping to do a different kind of sound - much more hi-fi, to pick a term. The big system then was Electrosound; man, was it ever a piece of shit, but that's what everyone was used to. After the show in '78 I recall 3 or 4 of the head guys at other companies hanging around telling me everything that was wrong with the GML/Nova system. Were they ever wrong. All of 'em.
The inheritor of bragging rights to that kind of system is undoubtedly John Meyer, who builds the best "big hi-fi" system I've heard recently.
George
p.s. I also went on the road with Little Feat and mixed quite a few of their shows. That those were existence-defining moments.