To quote a song I heard on a Johnny McEvoy record, "You play all the notes and sing all the words, but you never quite learned the song." Why not do the thing that was done back in the '60's---rename the group---The NEW Christy Minstrels comes to mind, as an example. Then the attitude, enthusiasm, and purpose can be maintained without the counterfit aspects becoming a problem. In fact, it becomes a kind of tribute.