Love my PX-3, the combination of the action, light weight and piano sound are unmatched. I'm using it as a controller as well as a piano. Anytime I choose a registration, the program change transmission shoots my Roland XV-5050 to GM Piano 1 no matter what program I tell it to send. I've shut off the program change receive on the Roland but I'd rather be able to map programs to the Casio. Anybody worked this out?