Minor thirds tuning makes it easy to play seventh chords as full
four note chords. Their inversions are also nice and simple since
going up an octave is just shifting up four strings in minor thirds
tuning, so you can invert a four note chord just by 'cycling the
strings'.

The twelve notes form a 3x4 block (vs 4x3 with major thirds tuning):

F# G  G#
D# E  F
C  C# D
A  A# B

These are the chords for Autumn leaves, staying as closely within
the block above as I can. Root notes are #

  . x .     x . .     . # .     . x .
  . x .   # . . .     . . . x   . x .
  x . .     x . .     . . x     # . .
  # . .     x . .     . . x     . . x

  # . .     x . .     . x .     . . x
  . x .     x . .     . # .     . # .
  x . .   # . . .     . . x     . . x
  x . .     x . .     . . x     . . x