Watch the 1 b3 b7 Structures online guitar lesson by Brad Carlton from Guitar Lab: Open String Universe
This lesson uses a root flat three flat seven structure on the 5th, 4th and 3rd strings combined with the 2nd and 1st strings open. Voicing 1 is a Bm 7/11 (no 5) voiced 1 b3 b7 1 4. Use dorian, aeolin or phrygian over this. Voicing 2 is a C#m7 (no 5) voiced 1 b3 b7 b7 b3. Use dorian, aeolian or phrygian over this. Voicing 3 is a Dm13 (no 5) voiced 1 b3 b7 6 9. Use dorian over this. Voicing 4 is an Em7 voiced 1 b3 b7 5 1. Use dorian, aeolian or phrygian for soloing. Voicing 5 is an F#m 7/11 (no 5) voiced 1 b3 b7 4 b7. Use dorian or aeolian or phrygian soloing. Voicing 6 is an Am 9 voiced 1 b3 b7 9 5. Use dorian or aeolian over this chord.