I would just like to draw your attention to a new video from “Embellished Turnings” about GrblGru.
In my opinion, the video gives a very good overview of the basic structure of the program and how to use it.
For people who are interested in GrblGru, I can only recommend it.
The other videos also contain a lot of information about
the embellishment of turned parts, among other things with the help of GrblGru.