Dear loft33, I generally align the SI joint and then put an SI belt on the person to try for a while when the joint isn't stable.
If you haven't tried stabilizing the joint with a belt, that would be next. In Canada we have a renown physio name diane lee
and she has designed a belt that is pretty much the premium belt used here. YOu can google it to get one mailed to you.
It comes with stretchy "correctors" that velcro on in addition, which you physio puts on if you have other malalignements
in you pelvis to correct for. Have your physio put the main belt on you while you are lying on your sacrum.(any good SI
treating physio will know this!).
I will not comment on prolo, it is pretty new here, and wouldn't be tried in Canada untill
after conservative care is tried. Perhaps in the US they are more aggressive?
Crystal