Not a bad plan at all and it sounds about right. The only thing I would suggest is to drop the mesquite. It is great on beef... but much too strong for ribs IMO.
If you want fall off the bone ribs, cook like you said but don't add the sauce. Add an additional 1/2 hour double wrapped in foil with some apple juice. Then open them up, put your sauce on and cook for 15 more minutes.
How's Cherry Brent? That wood has always caught my interest.
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Pretending to play golf since 1989