I get a "low elevator speed" and "zero yield" message on my Greenstar display on an 06 9760. The elevator speed on the display reads about 256 and was confirmed by a digital tach on the lower clean grain elevator shaft itself. My dealer says it needs to turn at least 280 for the Greenstar yield monitor to function. After troubleshooting for a couple hours we find out that my machine has an optional edible bean pulley on the primary countershaft that slows down the clean grain and tailings elevators. Is there a way to make the Greenstar yield monitor function with this slower pulley? or does anyone using this edible bean pulley just forego use of of the yield monitor?