I think we've all headed to the keyboard at one time or other for a little bit of help, so you might like this. The thing that always bothered me about hacking out a harmony on the piano is I don't know what voicing to use. You got at least 100 extended chords with the possibility of 8 or ten (probably more) voicings so how do you approach this. This guy nailed it with stock piano method. I don't know why I didn't think of this, it's really just a way to use shell chords. It seems that this would help your soloing as well.