Running a 01' 2388 and cannot get the white caps out of the clean grain. Here is the set up. AFX rotor, covers on the first and half of the second concave, all concaves are small wire. Veins are in middle position. Had every thing set to the book, now rotor is 1000, and fan speed is 1100. have adjusted chaffer multiple times in both directions. have not moved bottom sieve. Every thing is thrashed just cannot get the white caps out, and fighting a lot of trash. I have made so many ADJ. to concaves and fan and rotor speed I cannot mention. I cannot recall off the top of my head what chaffer I have, but have a Peterson air foil just sitting in the barn. Thinking of swapping them. Any input is appreciated.