Don, I didn't try the G-70 specifically. But the little EXR-5s has "Chord Intelligence" which allows you to play minor chords with just the root and the minor third-- above OR BELOW the root. It also allows you to specify whether you want the bass to follow the root or the lowest note.

I just want to know if the newer Korgs give the same flexibility. It helps to have choices, so you don't have to move your hand all over the place. -Ted