We have modelled an arena bowl element in Rhino/GH (Closed Polysurfaces) and imported into Revit 2019 via RhinoInside as a floor direct shapes. We are looking to attach wall tops to the underside of the bowl as per the attach top/base functionality for revit native roofs/walls. I have found this thread from August 2020 outlining a workaround from @eirannejad. I was wondering if there are any more ideas since then. Thank you.