I saw them pre-2112 at the old Aragon Ballroom in Chicago (Winter 75/76 I believe). 2112 had not been released but they played it at the concert. Don't even remember who they played with. Didn't matter. For some reason the one song I remember from that show was By Tor and the Snowdog. Oh, and I paid $5 for a t-shirt. And they came in colors other than black. I got a green one.
I remember they used to tour with Max Webster a lot. I have no idea why I remember that, but I do.