@brucegage I have had this problem on every slicer and for me it has to do with the z steppers and layer heights. Not all layer heights print the same. I had a 0.33 and 0.35 fail, but the 0.34 printed perfectly.
Also, just for fun, check your x-axis belt tension and the pulley set screw on the stepper.
I have active licensing for most of the slicer programs available to work with.