@golfshrink It sounds as if you are doing all of the right things. I have heard amazing things about acupuncture for many different conditions.
Please do not beat yourself up about not doing more when you were in rehab. At the end of rehab you were still in prime time to get that flex back as I was too. I worked hard on it but I too have less than 120 flex. I plan to have a minor procedure that will, from what I understand, snip some of the scar tissue to improve my flex. It's an outpatient procedure, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5800957/. Hopefully it will help.

Beyond having less flex than I would like, the knee is great. I can literally walk miles with no pain and exercise a lot. I also use a recumbent bike and have the seat in the closest position at this point. When I first started with the bike I had to start with it further back and after peddling for a while I would get off and move it forward. Now it is always in that position. That and water exercise are the two things most highly recommended by my orthopedic surgeon.
JK