Ultra Crispy Slow Roasted Pork

I think this maybe a five (or at least four star recipe) however it was only a three for me. I followed all instructions but I guess 9 hours was not enough. The skin was crisp, hard in fact in certain parts, but the meat came out tough, not fall off the bone as expected. I do think I should have put it back in the oven for another hour or so and if the skin was inedible so be it. We did save the meat by slow cooking it on the stove top in with some bbq sauce for delicious pulled pork sandwiches. I may try this again but with a smaller piece of meat, and a lot more patience.