We run peas, durum_hrs, barley, canola, flax, and soybeans. The factory rock trap beater is the biggest bottleneck on the axial flow combines. This newer style of beater is more aggressive by far. What they recommend on the rotor is to shorten up the impellers on the very front of the cone. What I noticed about this is it does not glob in tough conditions. That is similiar to what the afx will gain you in tough conditions. I know we paid somewhere around the $650 mark for the beater, but I assume they are way more $ w_ the iron prices and all.