Welcome @walkamok, I can definitely relate to Popeye's spinach 🙃but then I'm older than you. I also have degenerative arthritis and would have difficulty distinguishing the difference between the PMR related pain and the osteoarthritis associated pain. You might want to join in the discussion here where @dadcue has discussed the difficulty.

--- PMR and Osteoarthritis: https://connect.mayoclinic.org/discussion/pmr-and-osteoarthritis/

I think it helps to track your level of pain and the dose you are on. When it was time for me to taper down, if my pain level was above a 2, I would give it a couple of extra days to see if it stayed the same and then either go back up 1/2 of the previous taper or down to my next lower dose in the taper.
Do you keep a daily log with your pain and dosage level?