In a large bowl, combine flour mix, baking powder, salt, flax meal, and rice bran; mix well. In a medium bowl, beat eggs, then add buttermilk, milk, oil, vanilla, and sugar. Beat together, and then add to flour mix. Stir with whisk just until combined. Batter will be thick and lumpy...don't worry, it's supposed to be like that! Hubby always thinks it looks too thick, and I've tried adding liquid, but then they don't turn out right! Cook according to the directions on your waffle baker. In mine, I pour 1/3 cup of batter per waffle, and bake for 7 minutes. Enjoy! Leftovers can go in the freezer, and work great as freezer waffles another day.