I WAS RUNNING IN VERY SMAll BARlEY. IT WORKED WEll AT 1100 RPM AND THE SIEVE OPEN ABOUT 1_2 TO 5_8 INCH. I WAS COMMING OUT OF DRY PEAS AND DIDN'T REAllY WANT TO CHANGE THE PEA ElEMENTS SO I THOUGHT, "I'M JUST GOING TO TRY THIS AND SEE WHAT HAPPENS." I WAS AMAZED THAT IT WORKED SO WEll.