If it's just the flat, I would definately foil after 140 internal so it doesn't dry out. There really isn't much more smoke after it hits that temp, unless your pounding it with smoke.
So here we are in my paisley crib, what you want to eat?
"Ribs"...ah, Latoya, I don't serve ribs.
Better be happy that dress is still on,
I heard the rip when you sat down.