Had trouble at wheat harvest about half way through my antenna went to crap. Sent it off to ag express and got it repaired. Been cutting beans and was working fine. Til 2 days ago. It seemed to start to swerve a little. Well it for bad enough I had to quit using it and drive by hand. Talk to a friend and I recalibrated the the steering. Worked great today then about 3 round before I quit it got really bad. What is my next move here. I'm am pretty much clueless with oh autosteer.