An old Corona hand grain mill is often recommended and it does work fine in my
experience, but what a PITA to clean up. I've used the food chopper attachment for our Kitchen Aide with the 1/8" holes. It works OK but does better if the corn is run through for a second pass. My favorite, lazy way is to make the hominy and use it whole. When added to seasoned beans, salsa and lettuce you have a deconstructed tortilla meal. All the flavor with less work.