In Reply to: Peterson/Rigid Airfoil Chaffer posted by JHEnt on November 07, 1999 at 15:47:47 CDT:

We have a 9500 with the Peterson works well in sesame and klein grass.Only problem is the adjusting linkage seems weak.Any small bits of stems or rocks make it impossible to close.Once its almost shut it will keep sticks out.You have to play with the air to fine tune it.Have a rigid in a 8820,does not work in these crops but in oats,wheat and milo leave full air and it does a perfect job.Also its lighter than a toothed chaffer so it saves shaker arms and bushings.