Hi. I am installing the fm750 and ez steer in our 2wd JD 4640. My question is should I mount the gps antenna on top of the cab or on the front of the hood. The manual states to mount it on the hood. My concern with the front of the hood is the exhaust blocking the signal. I would assume it can react sooner and keep a more accurate straightline on the hood. Where would you recommend I mount it? Thanks