PS: I also around that time made a video in which I mostly improvise over these same backing chords for 11.5 minutes. Some of those ideas were drawn from the material you hear here, but most weren't and may one day make it into other work. Check it out: youtu.be/Fpgp9RepFR8
NOTE: The version posted here has more dynamics and is a little louder than what you'll find at the streaming platforms. It works on my system, but if (after purchase) you happen to find the streaming service audio friendlier to your system or more appealing, let me know; I can send you the file I submitted for broad digital distribution.