I don`t want to start a war here,,,,,,this is only my 2 cents....I just ordered my last combine without a yeild monitor,I think if you were to put scales on your buggy and a acre meter in your combine you would have far more acurate weights. Unless your in perfect conditions all the time the monitor will plug with garbage and won`t give you an acuarate reading,you will get it all calibrated and then change varietys of corn and it won`t give you an acurate reading.....i think they have a long way to go before they get one that works right in all conditions.I think their just a five thousand dollar acre meter.And you can get a care meter for 300 bucks!