I was in a very similar situation as you except I had a 3+4/ 7 Gleason with a family history of prostate cancer. A PSMA test showed no spread. When my PSA got to 4.5, I had RP. I had a positive margin. My PSA after surgery started at .02 and slowly crept up to .17. Some folks consider "undetectable" as any PSA score less than .1. I don't - to me any score no matter how low is detectable. That said my PSADT was less than a year so I chose (after securing multiple opinions) to take 6 months of Orgovyx and RT to the prostate bed and lymph nodes at approximately one year after my RP. I am now undetectable (< .006) and hoping it continues to stay at this level for a long time. I do have some manageable incontinence and ED issues. I'm grateful for the early success and comforted that I chose the aggressive path I did. Good luck. There is no looking back.