Watch the Saw Blade online guitar lesson by Jeff McErlain from Essentials: Advanced Blues Rhythm
Please check out to the original version of "Crosscut Saw" as you work through this etude. I use that song as a framework for this one, but I play different variations than Albert does.
As I have said before, it's great to have at least three variations for each blues tune you are playing. As you can see, each chord is being approached from a whole step below during the first chorus. This is the signature of "Crosscut Saw". On the second verse, I change it up a little bit by introducing a major sixth chord on the IV and V chords. This sounds great by softening up the dominant seventh a little bit and is very useful. On the final variation, I play off of dominant seventh sus for chords resolving down to the dominant seven.