OK, I'm late to the party. I admire everyone who can create great liquid, mixing all the ingredients, but admittedly wouldn't be here if not for the approaching regs. What about the idea of buying premixed base, such as 3 nic and 6 nic with 70/30 VG/PG? Can this be done economically? What about shelf life? Are there reputable vendors? What about getting flavors to add, how much, etc? Same vendor or different? Can those of us who aren't chefs get by?