Thanks so much, Janice and Bud! Yes, Mario has performed a track that has seamlessly blended in with mine. For me, it would not have been an easy thing to do, especially as some of the chord changes can be unexpected to many of us, but he has made it sound easy - and, from the time he wrote to me to when he sent me the final recording, less than 24 hours passed by. Hats off to him, therefore - and thanks for your kind words about me, too :-)