http://www.youtube.com/watch?v=FQP1YBLHvNg
Here is the current copedent on my E 6/9 Tuning for S10.

4 pedals, 5 levers, 10 strings! I trust most of you have that much of a steel guitar. Consider some of this idea that this "G" Lever opens up for you.
With the RKR engaged you basically have a window into the following chord voicings...
1) G Major Triad
2) G Maj. 7
3) G Maj. 9
4) G Minor Triad
5) G Minor 7
6) G Minor 9
7) G dom. 7
9) G 7 (flat 9)
10) G 7 (sharp 9)
11) G Aug. 11
There are of course others but all of these are in the open position. I point these out because they are all very useful and they have a nice full voicing.
Personally, I think this is huge plus for a 10 string player. I realize that many C6 type chords are achieved on the E9 neck by lowering the Es and playing C position at say the 1st fret. However, the above demonstration in my humble opinion shows a richer tone.
