If no one answers you, send a message and ask Barry. He is very supportive of folks learning slack key and would probably be happy to help. I asked him about it in general when he was in San Diego last year. What a super-nice guy!! Charles dis-es him playing slack key and there isn't as much in the recent concerts. I'd love to hear more of Nathan singing the old Hawai'ian songs with his gorgeous voice, but I don't believe that is his passion. n