I also remember seeing them at MSG in the late 60's. We had to leave early to catch the last train 12 miles home. Glen "whatsisname" was the lead singer and they did use orange amps. Can't remember who replaced Glen (whatever happened to him?) but the rest of the band was Chris Simpson and Davy Johnstone who later left to join Elton John. I think he was replaced by Tom Hoy. George Norris only came along some years later.
Ray