Much of this is overengineered. My entire wife's family is from Sicily, and I lived there for 5 years. The important step is to add the pasta to the sauce skillet after the pasta is al dente, and cook it for another minute or so while turning it. This is called "mantecare" in Italian. If you want, you can add a few lines of oil after you turn off the fire ("al crudo" i.e. "raw"). I have never seen anyone do the other steps.