Funny because of the voice of this guitar I have fallen on two new tunings. !! One is close to Spanish or G tuning DGDGBD but if you drop the second string to A (on the way to DADGAD) you get DGDGAD witch plays like double c banjo tuning but over one string (everything starting on the second string that would be on the first ) ! It works for a great G tuning with a different sound .
         Also I found if you set up the Guitar in vestabule or D tuning DADF#AD and then bring the First and sixth string up to E you can play as in Double Dropped D but again one string over ! (everything starting on the second string that would be on the first ) You are now playing in A . Have fun with this open tuning friends ! By the way I saw the show of Eliza playing a four string guitar,. Witch tuning did she use any ideas out there ? All the best , Guy