Hi Dan! To give credit where credit's due, the dealer removed the reverse bars, since his idea was that the friction of the new chrome and paint would "retard" the crop flow enough for adequate seperation. We never did get rotor losses down to an acceptable level, but then again we didn't try too hard, either. We simply wanted a reasonable speed with a clean sample in the tank. From their, we could start to "tweek" rotor speed and concave settings to reduce rotor loss, but unfortunately we didn't get that far.