Have a 2188 with AFX rotor, all OEM rasp bars. Heard there was a new recommendation involving the front of the rotor somehow when using the AFX rotor in a 21xx series combine, anyone heard of that? Also curious if anyone uses small wire concave in the front and two large wire in the rear for wheat or what works for you? We use a 1020 30' head and loose wheat out the back worse than 9510 and 9610 we combine with. I must be set up wrong. ANy help is appreciated.