I know what your saying and I can watch the machine/steppers make the move while not touching the part sometimes based on speed and length of the passes it may happen on all four sides or just one and is repeatable. I have redone my step config and only thing at this point that is changed is the latency figure is 3k less than before 16k-13k. I am going to test and work my way with the new ini file back into the backlash and following error changes that previously worked and try to find more clues.