No recipe, but its really easy.
i dont put any rub on the trimmings just salt and pepper em, I usually foil them from the beginning and cook them with whatever else i am doing or i will let them in the smoke for a little bit then foil.
then pick them over keeping the meat only and setting that aside for a later use.
when your gonna make the taco's you have to do the following
dice up finely equal parts cilantro and onion * you can add some lime and garlic powder if you want also salt and pepper* i do
for the meat i will just reheat the meat in some beer and i add to that a mixture of ancho, pasilla and arbol pepper powder and cook that through until little liquid remains.
slap some meat on a shell with some of the cilantro and onion mixture and some hot sauce of your choice and your good to go.
*i have been using an avocado sauce on mine recently, you can easily Google a recipe for this, its just Avocado,Milk and Parsley puree.*