Depending on the day sometimes hot dry afternoon and sometimes getting tougher in the evening we are haveing trouble controling rotor loss in canola? We are running three small wire concaves 410rpm 0-5 concave mid vains and afx rotors. We have tried a wide wire concave in the back doesnt seem to help nothing we do with rotor speed or concave helps? 40bu crop combine will take it at 4.5mph but to keep the loss down we are at 3mph? Any suggestions?