[HHB]

try tagging the thirds of the chords as they go by within your dual scale approach, if the progression is dominant use the minor third to major third, very popular. Start licks on each chord with this approach and you'll be doing the cornerstone of the southern thing, it's in everything fom SRV to Zep and ACDC. The minor third over a dominant always sound cool, but resolve for those thirds and it'll open up the licks your searching for in my experience. I dont use a major third over a minor chord unless I'm trying to make babies cry

use C-C# over the A7 F-F# over the D7 and G-G# for the E7

hope this helps

here's what is going on w/ the thirds. take the blues scale, the major pentatonic, the mixolydian and dorian modes and overlap them in the same potiosion, it'll give you all the major and minor thirds save the G# and you get that by overlaping the harmonic minor, this "overlap" is a master hybryd scale posotion ala SRV, Jimi, Billy G et al