I was in the Capitol Theatre  the night of this concert.  We were SHOCKED that Bob Welch was gone and the Buckingham-Nicks delegation was on board!  We had seen FM just that last early winter in NYC fronted by Bob.  Great show, from Peter Green material to "Station Man" and "Rattlesnake Shake" and all those great "Future Games," "Penguin," "Mystery to Me" and "Bare Trees" stuff.  I'll always stick by that line-up!  Do you have a FM concert from 71 - 74 with Bob Welch?