Chuck, you've cleared up the C2 question for me, too. I've come across the C2 notation in music and didn't know what chord to use, because the C chord didn't do the job. Funny thing, my sister has played piano for more years than she will admit to and two of my nieces are recent college graduates with music backgrounds, and they didn't know what C2 was, either. One more piece of fog just lifted! Thank you, thank you.