Brilliant news, so pleased for you.
My oh is also T3b G9 he had HDbrachytherpay followed by 5 weeks RT and now he's on a long slog with HT. so he still has a prostate, and his P.S.A has been 0.1 for 14 months now, he has 16 months left of the dreaded HT.with three monthly P.S.A testing. The fatigue aches and pains get to him, along with all the other side effects. He still works on our small holding every day growing veg, and continues to play music most days (he's a musician) He like you had few symptoms, just thought he was getting older. Sadly out GP was very slow to act, and refer.
The forum has been so good for us, I do the reading writing and research.
He has been told he is doing really well,and the oncologist talked about curative treatment.
Most days he's fine and feels positive, but with the G9 we are always cautious, but hopeful.