I didn't know about this device. Very cool. I have considered developing an algorithmic software concept based on lattices. This device is a hardware version of what I thought that might look like.

I might as well mention that Robert Fripp's New Standard tuning for guitar is entirely in fifths:

http://en.wikipedia.org/wiki/New_Standard_Tuning

Same side effect of turning seasoned guitarists into beginners, as the tuning is substantially different from other alternate tunings for guitar.