I'm only a kit brewer at the moment moving onto extract soon and I won't be doing all-grain for a good while yet (just so you know). Anywho, my uncle (who's a farmer) rolls barley for feeding cattle. The grain comes out crushed with no dust or fraying. The roller is a fairly heavy (and big!) piece of machinery that is run off the PTO shaft of the tractor. The barley is in a big pile on the floor (we're talking a couple of tons of the stuff, you feed the roller with a sort of an electric Archimedes pump) and you'd easily roll 70-80 kgs before every feeding. I was just wondering would this be of any use? If someone could show me a picture of the optimum rolled malt I could tell you if its close to what comes out of this roller.