I have not been happy for a very long time with the quality of cuts that i have been getting on my 3-d carvings. It appears that it is a z-backlash. But most of the time i can sand out the uneven cuts, but not always. I went just alittle bit stupid here recently and loaded the new control software, now the quality is even worse. Has anyone else had issues with the new control software or is it just me..