Thanks for trying Paul. If there was only the corner treads, I would manually edit them. The version in the image is the best I can do with "Artakan stairs" script, but still not good enough. I tried with Revit and ArchiCAD and I thought maybe Raiclone could be the saver, since I need the geometry you see in the image, and the bottom is smooth like in your cool tutorial on spiral stairs, and there are continuous limons, and continuous specific handrail.
Anyway, thanks again and good day.