I recently received delivery of this grain grinder: Kitchen*|*Grain and Grain Mills*|*Our Best Grain Mill - Lehmans.com First impression is that it's a very solid build with cast iron body and cast iron burrs. The body is enamel coated. Heavy. I had some trouble mounting it as it requires a couple of inches of table lip to properly seat. I ended up using the end of a 2x4 held in a vice! I tried grinding popcorn to make cornmeal as I've heard that popcorn makes a good storage grain and great cornmeal. To put it simply - it was TOUGH! Those little kernels are hard and it took about 45 minutes and a major arm workout to get about 2 cups of meal. The whole time I couldn't help thinking about how to motorize the thing. It was no fault of the grinder, just that popcorn is very hard to grind. The end result was a coarse meal that baked into a coarse bread. It was a workout to chew also! Let me just say, however, that the bread was some of the best I've ever had. I was told to expect this as the meal that comes from a grinder is way better than the stuff you buy in the bag. In retrospect, I would have gone for a coarser first grind, then sifted and reground the meal until it was finer. That probably would have been less work than trying to grind fine right off the bat. The next day, the bread was a bit more "tender" if that makes sense. Seems like the corn had absorbed some of the moisture and softened up. I would also try to let the batter sit overnight so the meal would absorb some water. I did try grinding some rice. That was WAY easier. I look forward to finding a rice bread recipe since wheat and I don't seem to get a long. The grinder is good. Popcorn in the grinder - not so much. I thought about this a bit and I feel that although the grinder is well built, more can be done to improve the ergonomics without having to motorize it. Motorizing doesn't make much sense in a survival situation. There is leverage to be gotten and bigger muscle groups to utilized. Eventually, I want to figure out how to mount a bike sprocket on it. I have no doubt that the grinding would go much quicker via pedal power. Just as an aside, I rediscovered traditional popcorn as a result of this experiment. To those who've forgotten: Throw kernels in a pot, cover with oil, put on high heat. Cover with melted butter, salt liberally. Yum. My kids couldn't stop eating it. No comparison to the microwave stuff they're used to.