Ok, now I've finally got itThank you for convincing me
The paths are calculated from the center of the tool, not from the tip. If the infeed is smaller than the radius, the green paths appear below the start line.
And you are right, this is of course a bug that I need to fix.
But please give me time. I have a lot to do at the moment and the error is not that serious. It won't break anything, it just needs time.
Thanks for your help to improve GrblGru