I have an older Dixon ztr-30 with a z drive transaxle. Recently, one of the two eye bolts towards the rear of the drive system broke. I have had a heck of a time getting the thing to drive correctly after replacing the broken bolt. First it was just with the one side I had replaced, but due to my idea of taking the other side loose to see how it was adjusted, I now have both sides out of whack. Can anyone offer any information about adjusting these bolts, or should I continue with the trial, test drive, readjust, test again ... method. Thanks.