1st time smoking and using WSM. Started with 3 nice baby backs..used "rudimentary rub" in Low and Slow cookbook...paprika, black pepper, salt, garlic powder, onion powder. Rubbed ribs with prepared mustard before spreading on the rub. Started with Kingsford coals 3/4 filled coal holder and 3-4 chunks of applewood. Cooked about 4 1/2 hours. Top thermometer on the grill stayed at about 270 degrees and refilled coals and water pan after about 2 hours. Ribs came out slightly burnt, salty and dry. Can't be the cook so I must have bought dry ribs???