Pulled into our oat field tonight to take a test using Case's default settings, thought their setting didn't seem right. Concave 26, Rotor 780, wind 780, top sieve 15, bottom sieve 10. set the pre sieve at 3. To me I think that the concave should be tighter, rotor faster and sieves opened more. This is my first year with a Case combine so still learning. What setting do you use for oats.