Example usage would be spiral ductwork, screw threads, flexible metal tubes, circular ramps etc. No smoothing groups are assigned, for smooth look either use Smooth modifier or add points to the spline profile.
Path follow is now possible:
Note: The AUTO update switch uses change handlers to update the shape when geometry/topology of the profile spline is changed. Use with caution.
Installation: Copy the .ms file to your scripts\startup folder or run as a script if you only want to try it out. The object primitive will be available under Examples in the Create panel.