Originally Posted by: bunmiadefisayoI should have replied a while back but the LAN connection in my room has conked out.

In any case thanks for the replies. This seems to work only with sus chords and doesnt work with major chords. I'm not surprised though, due to the clash between the flat 3 and natural 3 in the scale and chord respectively.

You were actually onto something, Because in certain degrees it does work over Major chord progressions.
Example: Let's take a GMaj7 chord= 1-3-5-7 (G-B-D-F#) and you were to build a minor pentatonic scale from the Major 3rd of the G chord, you would have a B minor pentatonic scale because B is the 3rd of G Major.
The B minor pentatonic scale = 1-b3-4-5-b7 (B-D-E-F#-A) and although the root is not present, the 3rd, 5th and 7th are.
You could also use E minor because it is the relative minor of G Major.