farmertony- it was hard thresh wheat, it would throw wheat if you went more than 85% load,there were 4narrows and 4 wide wires, didn't matter what I used. Had to install atleast 4 different rub bars to stop it,it worked in Austrailia but won't work in Canada, too much straw will plug the rotor. Also did it in barley,installed one wide wire in the first position on the left to stop the loss, worked well.