I am also G9 CR stage 4a I was on Lupron and Erleada for 6 months then surgery then 6 more months of drugs That started 41 months ago and my PSA has been undetectable since surgery in June of 2022. My UCLA urologist has advised me that my event free status is the result of the experimental treatment that I received. Look into androgen restrictive drugs such as Erleada Good luck