Place your small pork cubes in a pan on low heat and let the fat render. Bring heat to medium and cook, stirring periodically until your pork is nicely browned. If there is too much fat in the pan, drain until there is about 2 tablespoons of fat per serving of pasta in the pan.
In a bowl, mix together your eggs, pecorino, parmesan and pepper to taste.
Boil your fresh pasta and pot of salted boiling water for about 2-5 minutes depending on thickness.
When your pasta is cooked to al dente, drain, conserving the pasta water and place in your pan with your cooked crisp bacon. Make sure the pan is warm but off the heat.
Add your egg and cheese mixture to your pasta along with a bit of pasta water and mix vigorously until the cheese, pasta, water, eggs and pork fat is emulsified (has come together. Taste and adjust seasoning.
Remember your pasta water that you are adding to your carbonara is salted to try not to add too much salt at any other stage until you have tasted the mixed pasta.
Top with more cheese, black pepper and serve immediately.