The shoulder is my cut of choice. Most will be 15# to 17#. I only , so far cook one at a time on the top rack . I like to place it between the handles so it will not touch the sides of the lid. If you can not get two on the top put one on the bottom with foil on the ends so it will not burn from the heat. I like to cook mine un trimed, skin side down, never turning.
Enjoy!!!!
Rick