Sorry for the late reply. I'm on vacation.
I did try them again. Had a similar experience as before. First 3 hours went great. Then foiled them with warmed up apple juice. After an hour and 20 min they were around 200f. perfect!
This time I nuked the bbq sauce and put them back on. After 30 min they I pulled them. They were 145F and was pretty frustrated. They were not that good.
I wonder if I would have sauced them and put them on a hot grill if that would have made the difference. I don't have a gas grill at home so that's why I put them back on the smoker. I just feel like they dry out during the last stage. I'm even thinking of stopping the cooking process after the wrapped part, just sauce them and serve. When I unwrap them they look juicy, soft and delicious.
I think you have the answer, forget putting them back on after the foil.
The reason for putting them on a hot grill is to burn off the membrane & caramelize the sauce a little.
They really don't cook much more.