I love working with the same material in different improvisations for it reveals the limitless possibilities of one single motif. I've experienced this in your work with E-A-B-A and the Dies Irae. I'll post a more specific example of this soon...something I've been withholding for a while from that magical year, 2008.
Wow, that "Agonizing question" is stunning in its power, and its quick harmonic development is as riveting as...the "Agonizing question" is stunning in its power! At the beginning I had thought you had beat me to a devise I'd used some around August-September 2008, that is all of a certain note crawling up and down the piano (in my case, all the A's of the piano from bottom to top to bottom) creating a canvas on which to paint the improvisation. (I'll post examples sometime in the future...) But yours was much less of a canvas, and more an actual dramatic, directional element. Bravo! It is quite stunning in its power! And the gripping chords Riveting.
Thanks Chopinatic! We are missing your improvisations. Have you done much playing lately?