I doubt that removing the filler plates will make much differance in small grains. The reason some people remove the filler plates is not for performance or capacity reasons, but, when harvesting small grains, the dust and small grain can fall between the spaces in the cylinder and settles at the bottom of the cyinder and therefore throwing the cylinder out of balance. Perhapes you might have noticed after driving down the road to field and when you turn your seperator on the combine sometimes vibrates. This is the reason. It's much more noticable in small grains because we usually run the cylinder faster. The last time re changed the rasp bars in our 9500 we installed the perferated filler plates. It helped with the vibration but made no noticable differance in performance.
