Drizzle with hot Roasted Turkey Stock; toss well. Lift wing tips up and over back; tuck under turkey. Stuff 2 cups sausage mixture into neck cavity. Fold skin over sausage mixture, and loosely secure with several wooden picks. Stuff 3 cups sausage mixture into body cavity. Spoon remaining sausage mixture into an 11 x 7-inch baking dish coated with cooking spray. Cover dish with foil, and refrigerate until ready to bake. Tie legs together with kitchen string.
Place turkey, breast side up, on a roasting rack in a roasting pan.
Brush turkey with oil; sprinkle with remaining 1/2 teaspoon salt and remaining 1/2 teaspoon pepper. Cover breast with foil.
Pour 2 cups water into pan.
Bake at 325 for 2 hours; remove foil, and baste turkey with pan juices.
Add remaining 1 cup water to pan, if needed.
Bake an additional 2 hours or until thermometer inserted in meaty part of thigh registers 165, basting every 30 minutes.
Remove turkey from oven; let stand at least 30 minutes before carving.
Increase oven temperature to 35
Bake the remaining stuffing, covered, 25 minutes or until thoroughly heated. Discard wooden picks.