Stu , I would ask your medical team for every 3 month PSA until PSA is undetectable. I would also ask of you can be put on the list for a PSMA PET scan list . At or above 0.3'ish you should be able to get a "echo" back to show If/where PSA is starting from and a target .Let us know how you are doing and what Dr's say . Im interested . God Bless you ! James from Vancouver Island .