I was at this concert. It was a last minute addition to Fleetwood Mac's Reggie when Christine McVie was added. The last time all 3 guitarists played at any gig. It was in the hopes that the 3 would keep together. Peter Green would not play unless Jeremy Spencer was off the stage. Spencer's Slide and Stage presence really stole the guitar work while Christine singing and playing added a new dimension to the band. When they announced " last song" my ride wanted to beat the exit traffic and since it was Monday and we had to go to work the next day we left. I heard later, after the band took a 20 minute break, they came back to jam and work thing out. The stragglers who stayed for autographs moved to the front and got a private concert. Some guy was said to ask to come up and jam which they said OK. Dang, 😜 I missed out on that one! 🤠