The unit does a good job of sifting freshly milled wheat grains into bran, middlings, and flour. The unit is fairly quiet, it is not irritating when it runs. I found that the 80 mesh sieve outputs a very fine flour but would like to purchase the 70mesh because too much of the fine flour remains in the sieve. I have left questions about where to purchase other sieves but have not received any response. I found one small engineering issue. The spring that holds the sieve in place while it is running only clamps one sieve at a time. The most effective way to use the device is with both sieves attached at the same time. The top one captures the bran and the second the middlings. I had to carefully stretch the spring to make this work. Can anyone help me find a place to order other sieves?