I feel like this is kind of a dumb question, but... I just got a grain mill, so I'm planning to mill my own grains going forward (that is, after all, the reason I bought it). But what about flaked wheat/oats/barley? It seems it's already been processed in such a way as to make it "available," for lack of a better word, to the mash. Are those to be milled, or not, or does it really matter?