Carolina Pulled Pork Sandwiches

Name: Carolina Pulled Pork Sandwiches
Ingredients: 1 1/4 cups apple cider vinegar; 3/4 cup ketchup; 2 tablespoons dark brown sugar; 1 tablespoon Worcestershire sauce; 1 teaspoon crushed red pepper; 1 teaspoon Dijon mustard; 1 (4-lb.) bone-in pork shoulder; 1 tablespoon hot pimenton; 1 tablespoon dark brown sugar; 1 tablespoon kosher salt; 1 teaspoon dry mustard; 1 teaspoon onion powder; 1/2 teaspoon celery salt; 1/2 teaspoon garlic salt; 1/2 teaspoon black pepper; 1 tablespoon canola oil; 1 (12-oz.) pilsner-style beer (such as Dos Equis); 8 hamburger buns or bakery rolls, split