Part of the LOA program at BluesHarmonica.com is music theory study and accompaniment playing. Right now I am studying how to use various tones in soloing and bass lines for accompaniment playing. I have had quite a few revelations in the process. My mix of chord tones vs other tones have been completely off and now I know why. Also, the V-chord is much less mysterious now.
See the vido of my train imitation in class at HMWS 2014.