Thank you for your reply. I should have mentioned the machine stats in my initial post. I have .00005" backlash on the X axis and "0" on the Y axis. On the full G-code file for this part, the center hole cuts out fairly correct, (within .001" diameter variance at clockwise position of 1:30, 4:40, 7:30, & 10:30. The 12, 3, 6, & 9 o'clock positions measure exact.)
Thank's again for the reply and we'll keep searching.