1 of my 2010 JD 8320Rs will work good 40-50% of the time. Then it will move up to 4-6 inches right or a hour or so , then work it's way back to where it's right on for a while. FM 1000, Ag 25, Plugged into the JD steering. I put a 4" offset in last night, & in abut a hour had to go back to other config. Pulling a 3pt switch plow. 3800 hours on tractor.