We are just testing out our p1060 air cart before we hit the field and the meter rolls are not holding the same speed. We are just in the yard trying it with the buttons under the cart, not moving. They start off fast and then slow down gradually. Brand new battery, Alternator is putting out 12 volts and it just does it with the charger hooked up with 14 volts. Am not able to select a desired rate in my program in the screen (intellivew III) and is a variable rate tank even though we don't do VR. Any suggestions what my issue is, if its on the cart of in my computer. Thanks in advance.