Yeah, I was aware that Joe played keyboards with them a lot, even on the Live in Concert album. I never understood why they didn't enlarge their line-up - Joe as their chief songwriter wanted it and always said it was his reason to move on (and he never played in a trio format again, even when he played harder music), were Fox and Peters so unsure of their position that they resisted it? Ironically, the remaining history of the Gang was basically a never-ending quest to find a stable line-up where two people did what Walsh had done before alone. They turned into a quartet with separate lead guitar and lead vocal roles and never added a keyboarder for good.