For "fall off the bone" succulent BBQ ribs - pork or beef - use a crock pot and slllllooooowwwwww cook them for a very long time - 4-6 hours.
I used to par-boil, baste in sauce, then cover and put in the oven, OR, wrap in foil and put on the grill for a long time, and got good results. But, the crock pot just takes away all the worry, mess and concern.
Put it in with the sauce on and forgetaboutit.
Works for me!
Shalom!