Just wandering what are your typical ground speeds? I am harvesting with an 1982 7720 with a 643 corn head and 216 platform head. We typically run in 170-210 bu/acre corn and 45-65 bu/acre beans. What are your ground speeds with your other settings? I try to run 3.5 to 4 mph in corn and 3.1 to 3.5 mph in beans.