Heat smoker to 250⁰ F
Remove silver skin and trim excess fat from rigs
Rub ribs with mustard followed by the dry rub
Smoke for 2 hours
Spray the ribs with apple juice mixture every 30 minutes
Remove ribs from smoker and place on aluminum foil long enough to cover the ribs
On the ribs add a few patties of butter, apple juice and sprinkle with more rub and vinegar sauce
Double wrap the ribs meat side down
Put the wrapped ribs back in the smoker and cook for 1 1/2 hours at 250⁰ F
Remove from the smoker and let rest for 30 minutes
Place the ribs on fresh aluminum foil meat side up
Brush the ribs with warmed BBQ sauce and return to smoker for 15 minutes
Remove cut and serve