I wish Autodesk would develop a 3D stair object that actually takes into account the stair geometry we all need to understand in order to design stairs. The 3D stair objects provided in ACA don't work because they don't start and stop at the right points and therefore don't accept hand rail designs that work elegantly. I end up having to design stairs using 2D design methods, principally in section.
L.L. S3A