My Y axis backlash is now just over 2 thou. It used to be under a thou and I'd like to get it back there. I've ruled out both the X and Y axis gibs as the problem since a tight X and a very loose Y gets me to about 1.9 thou backlash on the Y. The next step I believe is to increase the preload on the Y axis ballscrew, however, getting behind my machine is a true pain in the axis. Can you even adjust the Y without removing all the splash guards? They look to be right in the way of the wrench travel if the nuts are positioned the same as the X axis.