Felix, Arc construction works very well.

Report to Michael of a peculiar behavior that happens during opening of the attached file.
The Scene browser Style red-ish color "UserLayer01", drawn as a Circle, is turned OFF upon reopening the file in Moi3Beta.
Have to click on the eye icon area of UserLayer01 to turn the Circle on.

I Moi2, the red-ish Circle shows up upon reopening the file.