Well, as promised, we tested our original wheat grinder. This thing had no instruction manual and is so old that finding a manual on-line was fruitless. We did our best and the first batch of flour had a very interesting color and flakes of brown in it. Since we had learned from the first wheat grinder (more modern), one should throw away the first batch of ground wheat as it is used to "clean out" the grinding mechanism parts of any unwanted machining debris. We threw it out, but still had no idea why it was flaky with chunks of wheat berries mixed in... Turns out there was a piece of cushioning cardboard between the grinding stones from shipping. (face palm, I told you it was un-used, un-opened even!) After a thorough going through, we re-assembled the unit and proceeded to grind a real throw-away batch. It was smaller, so we could get right on the real deal. Who knew that the Bosch that made a gazillion batches of cookie dough for me in my ea...