Mockmill vs. Moongiantgo
I bought a Mockmill (stand mixer attachment version) about a year and a half ago and have been using it occasionally to mill small quantities of specialty grains. It usually takes about 45 minutes or so to mill a couple of pounds of berries. Recently a friend said she had a grain grinder that she bought and never used and asked me if I'd like it, so I said "sure." What she sent me was a Chinese product called Moongiantgo which is essentially a gigantic heavy duty spice grinder. Today, I tried using it for the first time. I was skeptical it could make flour of the quality of that produced by the Mockmill. Well, was I ever wrong. I put about 200 grams of berries in the Moon Beast and in 45 seconds I had flour. I ended up making 4 batches and in about 5 minutes I had the same amount of flour that it would take the Mockmill over an hour to produce. I sifted through 60 mesh and ended up with about 68% extraction - similar to what I achieve with the Mockmill. The grinder did raise the temperature of the flour a little, to about 80F, which the Mockmill doesn't tend to do. My question is: what am I missing here? Why would I want to spend an hour or more using the Mockmill when I can apparently produce essentially the same flour in a few minutes with Mr. Moonbeam? I can see the Moongiant working very well with softer grains like Einkorn which always jam up the feed throat of the Mockmill. What are the advantages/disadvantages of the two milling processes?
I got into home milling about 4.5 years ago for similar reasons. It didn't take long to learn how enjoyable it is to play with different grains and their various flavors and baking characteristics.
The Mockmill KA attachment doesn't have a great reputation among home millers in other forums. People generally say roughly the same thing as you do. It's a less costly way to get into milling grain, but can tend to be a little frustrating. (By comparison, our Mockmill 200 can mill 500 gm of wheat in to fine flour in roughly 2 minutes.)
There are a variety of mills that use different techniques to produce flour: stone vs impact mills are both pretty common. I had never heard of the Moon giant version and had to go look it up. I don't know of any reason not to use that.... I suspect it would be quite similar to using a Vitamix to mill flour. Not sure what the lifespan and warranty would look like, but since you got it free, go for it!
Mary