I'm not a big fan of long sous-vide cook times for babybacks myself, I find it makes the meat a little too mushy. What it usually do for baby back is :
- Trim (silverskin, extra fat)
- Brine for 1-2h (simple salt(7%) sugar(3%) brine) (rinse them throughly after)
- Dry rub
- Smoke for 1-2h at low temp (could even be cold smoke)
- Sous-vide for 6-8h at 170F. (at 6h the meat requires a little pull to come off the bone, at 8h it starts to fall off a lot more easily)
- Finish on the grill at high temp with sauce. Or cool and refrigerate until you need them (i'll usually reheat for about 30-45mins in a 130F bath, but I suspect you could just reheat them on the grill just fine)
Brine and smoke are optionnal, I just find brining keeps the meat a little moistier.