I was at that show as well. Feb15, 1971…changed my life…I was 17 and didn’t know that music could make you like that..this was on the Auditorium side (not the Arena). And a very small crowd…instantly became a life long ABB fan! They played everything and we were blown away! Duane told us, There aren’t very many of you but you have a lot of heart. I’ve heard this was a dress rehearsal for the Fillmore concerts. It was only a month before.