Hey, unsure where to put this in the forums. I really want to learn John Mayer's Walt Grace Submarine Test Jan 1967 as seen in this vid:

Anyone help me with the tuning he is using here?
I realise he is using a 12 string resonator but I would like to play it on a regular acoustic - any help would be appreciated!
Last edited by jamesmckee92 at Feb 1, 2014,