I have a 1688 and I installed Loewen's afx rotor kit for the front of my specialty rotor. I finally got to try it in wheat yesterday and the straw doesn't seem to be chopped nearly as fine as it used to be. I'm starting with new chopper blades and the taller concaves, the same as last year. I'm just wondering if it could be the afx conversion and if so what might be a remedy to the straw not being chopped as fine. It isn't real course, just not what I want. Any tips or comments would be appreciated.