I see either some people here don't know how to set a monitor or listens rumors I don't know,but I run over twelve thusand acres of wheat,barley,corn,and soybeans a year with 2 9750's use to run 3 9650s.Compared both..Agleader needed to be calibrated more than twice a season for sure!NOT ONCE A YEAR no way!!Never worked that good.You can't calibrate for corn at 26% moisture and expect it to be right on for 15% corn,I ran agleader for three years,greenstar was the same way,major changes in crop,better recailibrate.Greenstar wasn't far off of agleader,not like everyone says.When you cal use a whole or half truck loads,check chain tension before cal,and keep it the same tension over the season,keep average speeds when cal,don't cal in rough part of field,cal in average hill sides,weigh wagons are ok to get close to accurate but not as good.Greenstar has only been within 2.0% off at average.Agleader was about the same,but you had to wiegh four loads all the time. If a person knows what they are doing,both monitors will work well.