Update. I cut some of the roots between #1 left to #9, pictures in the thread with numbers on Blue tape. Then I threw some mulch to cover the roots back up. There was some per-mature "leaf drop", but it is starting into fall. We'll have to wait til next spring to see the results.
Thanks to everyone who has helped with my challenge.
UPDATE - I removed 10% of binding roots last year. In the fall I will remove another 20%. Goal is to keep the tree for another 4 - 5 years, when I move. The first picture is this year. Second was from last year.