Originally Posted by: russell haywardThanks, useful stuff.

Basically I need to learn the notes in each chord and try and target them a bit more.

Hey Russ, with Blues being your style, you can incorporate the Mixolydian mode as well to add a little flare in your progression along with dominant 7th chords.
Example; A7-D7-E7, playing A Mixo over the A7 chord, D Mixo over D7 and E Mixo over E7 will spice things up.
Good luck.