Three Cool Major Minor Chains

1. Take every other one of Db Eb Gb Ab Bb C D E F G A B, both odd
and even step choices, and get two different Major + Minor hexachords.
Both have a spooky "astrological" Holst-Planets-like sound.

2. This cool chain: G Bb Db Eb Gb A B D F which could be considered
an Eb 7 M7 9 #9 #11 b13 chord, the #9 acts to make it Major-Minor,
taking pieces of this is like a very bluesy chord, taken over three key signatures

3. The Messaien hexatuply layered alternating octotonic scales I mentioned previously.

Scale 1 would be best tuned in augmented tuning, Scale 2 would work in many kinds of tuning, with emphasis on 7-limit regular temperaments, and Scale 3 I guess would work best in diminished tunings (or those temperaments divisible by 4)

PGH