Going to answer my own question here.My assumption that a snug eccentric nut was a good thing was wrong. One of the y-axis rail eccentric nuts was a bit too tight so easing off on it fixed the issue.I would suggest that when you are adjusting these, run the axis at 250mm/s (15000mm/min) back and forth to make sure it is running smooth.You can use the G-Code command: G0 F15000 [axis][location] ex. G0 F15000 Y200