Watch the 1 5 7 3 Structures online guitar lesson by Brad Carlton from Guitar Lab: Open String Universe

This lesson uses a root fifth seventh third structure on the 6th through 3rd strings combined with the 2nd and 1st strings open.

Voicing 1 is an FMaj7#11 voiced 1 5 7 3 #11 7. Lydian is the appropriate scale for this chord. Voicing 2 is a GMaj7/6 voiced 1 5 7 3 3 6. Ionian and lydian modes fit this chord. Voicing 3 is an AMaj9 voiced 1 5 7 3 9 5. Ionian and lydian modes fit this chord.