Zero concave so that it ticks rotors and back off till ticking stops. Rotors 1400. We just took a sample off so I don't havefan speed and seive settings. However it appears that the flax is rather heavy this year so I am thinking fan in the 550 area. Will know more on this and seives once we get ours set with the screen.Anybody got settings for CR8090 in Flax.