To add to this Thread. I’m running 2.79b and I found I was able to get it to work as long as I was in orthographic mode. I had some issues when in one of the number pad views. I couldn’t get it to work when I hit 3 for side view but as soon as I moved the view using the middle mouse button and as long as I was in orthographic view (hit number pad 5) I was able to get the grease cut to work.
I also used the built in Carver MT add on. That add on took a little while to get used to but it works great.
