He switched to Piano (from guitar) after losing the tip of a finger on his left hand in a gun fight. I once had a conversation with a LA studio pianist who was checking out Dr. John's solo piano recordings - not just for the "notes", but for the "feel" - that mix of "in between straight-8th and swung-8th note" feel. Check out his Left Hand "time".... I don't think he did any "Duo" recordings with a bassist. (His group & vocal work is wonderful, as well - Right Place, Wrong Time, for example.) Thanks, Dr. J.