Glad to hear you lost your back pain. It is a pain! ha
Mine was usually in my lower back. Now it's mostly in my mid back. I can't tell if the lower back pain left or is just being overridden by the more intense mid-back pain.
I've had some 10/325 oxys and your right...much more potent.
When I had my shoulder surgery they gave me some red and white capsules that I called "Red Devils"...I'd take one of those and just go away for four hours or so. If I ever knew what they were I have forgotten but they would kick your butt right on outa here.
Gettin old beats not gettin old but in general it sucks, too. :-))