Astro; Thanks for acknowledging my post. Your comment was very pertinent 'Why not use the experience of experienced players to extend your own!'. Recently I reinvigorated Paul Archers garden in exchange for some guitar lessons. I,m a semi-retired landscape gardener and Paul freely admits to not knowing much about gardening. Fair exchange! All those years of struggling to become reasonably adept with standard tuning and then the joy of having the basics of open tunings explained in such a short time. The wonders of guitar playing never cease.