Corona Mill Mods | Community | BeerAdvocate
· I use a corona mill. It works well for the money, I get 80% efficency and no stuck sparges. I did have to do some dialing in. You can adjust the crush, there is a screw to adjust how close the plates come together. basically, the grain coming out of the auger pushes the outer plate out, the screw controls how far out it is allowed.