Cut lean pork into .75 - 1" pieces. Set aside.
Cut fattier class II and class II pork into 3" - 4" pieces. Set aside.
Mix salt with cure #1 and divide proportionally for each meat type: lean pork - 12.3 g and fattier pork - 2.2 g. Scale up if making a double, triple, etc. batch.
Mix each meat type with its allocated curing mixture in a separate bowl and refrigerate for 48 hours.
Grind the fattier pork together with the garlic through a 1/8” (3 mm) plate. Transfer to the bowl of a stand mixer fitted with a paddle attachment. Add the hand-cut lean meat and the spices. Mix on the lowest speed for 5-10 minutes. Add a few tablespoons of water if the mixture is too thick.
Stuff into 55 mm natural hog casings and form rings. Prickle air pockets with a needle.
Hang the sausages at room temperature in a drafty area until the casings feel dry or mostly dry, about 2-3 hours.
Dry in a smoker without smoke for 30-45 minutes at 110F - 130F with dampers fully open.
Smoke at around 130F to 140F for 3 hours.
Bake in the smoker at 175F - 195F until the internal temperature reaches 154F - 158F. This can be done in a oven. You can also finish by poaching or steaming.
Cool down to about 50F - 60F by placings sausages on a cold surface, e.g. a marble slab. Refrigerate thereafter.