Not sure if this should really go here, or in the Jazz, Acoustic, Classical & Fingerstyle Forum. Anyway, I'm looking at doing a number of Flute (or Violin) & Cello Duets with one of the kids. So I'm looking at a tuning that has a Low C. Right now, the only option is to re-string my 25-1/2", 6-String, Steel String Acoustic. The first three alternate tunings that come to mind: CGDAEG: Robert Fripp's NST/C-Pentatonic CGDGBE: Steve Tibbett's CGDGAD: "Steve Vai's" Low-C Fripp's has an obvious appeal because the bottom four strings are tuned like a cello, is mostly regular and gives more range on both ends. Tibbett's is nicer for still playing pieces in standard tuning and many of the various 7-Chords line-up nicely. "Via's" Low-C gets the bottom three 5ths, and has some nice R-5-8 combos. Not having gone down this route, I'd like to learn from anybody who's tried this.