To make the marinade, in a small bowl stir together the vinegar, oil, Country Bob's All Purpose Sauce, chili powder, red pepper flakes, salt, pepper and Tabasco sauce. Place the chicken wings in a large plastic food storage bag and pour in the marinade. Press out the air and seal the bag tightly. Massage the bag gently, to distribute the marinade. Set in a large bowl and refrigerate for several hours, turning and massaging the bag occasionally.

To make the blue cheese sauce, in a small bowl whisk together the sour cream, mayonnaise, garlic, Country Bob's All Purpose Sauce and blue cheese. Season to taste with salt and pepper. Add enough milk to make a sauce with the consistency of pancake batter. Cover and refrigerate.

Prepare a fire in the grill. Remove the wings from the marinade and pat them dry with absorbent paper towels; reserve the marinade. Arrange the wings on the grid. Grill, turning frequently and brushing with the reserved marinade, until cooked through, 25-30 minutes. Serve with the dipping sauce and celery sticks.