For years I try'd different tunings on my dobros and slide guitars until I got into using an open D tuning (DADF#AD-lo to hi). I discovered that by lowering the hi D 1/2 tone I got a Dmajor7,which has a New Age/Hawaiian sound. Another fret lower is the D7th great for Blues etc. Next step down is the D6th great for Western Swing and Jazz licks. I hope this isn't to far off your thread Mooh. Cheers.