Rub the pork with the BBQ Rub, then place in a pan with the vinegar. Cover with plastic and foil, then roast for 3 to 4 hours. Let cool, then remove the fat cap and bone and shred the pork.
Heat 3 ounces pulled pork. Place the macaroni and Cheese Sauce in a saucepan and cook on medium heat until hot. Place the macaroni and cheese in a bowl, then top with the pork, BBQ sauce, smoked Cheddar and green onion. (Reserve the remaining ingredients for more servings or another use.)
Combine the chile powder, paprika, salt, granulated sugar, brown sugar, crushed red pepper, cumin, garlic powder, onion powder, cinnamon and ginger in a bowl.
Place the brown sugar and ketchup in a bowl and mix well. Add the vinegar, mustard, hot sauce, paprika, pepper, salt, Worcestershire and 1 cup water and continue to mix until well blended and the sugar has dissolved.
Melt the butter in a pot, then add the flour, stirring until smooth. Cook for 3 minutes. Add the milk, cream, salt and pepper. Cook on medium heat, stirring often, until thickened. Turn off the heat and add the cheese. Stir until melted.