Watch the 1 5 b7 Structures online guitar lesson by Brad Carlton from Guitar Lab: Open String Universe
This lesson uses a root fifth flat seventh structure on the 6th, 5th and 4th strings combined with the 3rd, 2nd and 1st strings open.
Voicing 1 is an F9#11 voiced 1 5 b7 9 #11 (the 1st string is omitted). This chord accepts the overtone mode. Voicing 2 is an F#11b9 voiced 1 5 b7 b9 11 b7. It accepts phrygian and phrygian dominant for soloing. Voicing 3 is a G7/6 voiced 1 5 b7 1 3 6. Mixolydian, overtone and half-whole diminished apply. Voicing 4 is an A9(no 3) voiced 1 5 b7 b7 9 8. Mixolydian, overtone, dorian and aeolian apply.