@ozelli
I am really very interested in following your progress.
I see your numbers as follows:

Radiation Type: Proton Beam
Number of Sessions: 21
Last PSA before treatment: 17.53

With no ADT post-treatment:
[2.5 months post Tx: 4.33]
3 months post Tx: 4.11
6 months post Tx: 2.47
9 months post Tx: 1.83
12 months post Tx: 1.22
15 months post Tx: 0,94
[18 months post Tx: skipped]
21 months post Tx: 0.60
[24 months post Tx: skipped]
26 months post Tx: 0.40

I had 6 months of ADT-Orgovyx, starting from two weeks before SBRT. I am 1 week off ADT now, and my second PSA test post-radiation is this coming week, My radiation oncologist originally told me that I will be on Orgovyx 8 months to a year, but when see saw my PSA:

3 months post Tx: 0.36 , she indicated that 6 months was enough.
6 months post Tx: To be determined week of Oct 6.

I will be happy if it is already undetectable by this month, but I won't mind if it is still >0.1 ; I think I have balanced my treatment (between no ADT and some ADT post-radiation) and need not extend hormone therapy beyond t6 months.

Thanks for the update on your month 26.

I am encouraged with your record of consistent PSA drops with no ADT at all.