This is a good thread Jimmy - an overdue topic. I use C6th mostly now I'm not playing in a country band.
The "secret" that I found was to revert to a G on top instead of the D that is becoming more prevalent. One tuning with "chromatics" (we know what is meant by the inaccurate term so don't go there!) on a guitar is enough, I reckon. Then you treat that neck as a "plank tuning" - i.e. learn to move the bar - with sparing use of the pedals changing the basic tuning, rather than pedalling in the notes as we do on E9th.
Here's a tip/excercise. Try finding the notes for "When You Wish Upon a Star" in G (start 5th string 7th fret). Don't go up past the 14th fret or down below the 6th fret, and see how many times you can jump intervals at the same fret (clue - e.g. the first two notes). If you do that a number of times you'll discover the relationship of the notes without doing "scales" as such. Every tune contains scales anyway, mostly partial ones, but they're there.
If anyone wants me to, I'll tab it out (somehow) but try yourself first?




