Core only allows single selection

[KrisM]

I come from Archicad and Revit where I am allowed to designate multiple layers as a core element. Two examples would be an 1) ICF where I have three layers (insulation, concrete, insulation) but want the whole assembly to be a core 2) An exterior frame wall where I want to include the exterior sheathing as well as the stud as the core element. VW only allows you to pick one layer as a core. With regard to the stud wall, I could just dimension to the studs and that would be okay (although not common practice around here) but the ICF is a different problem. I want the layers to show in a section but need to dimension to the exterior face of the ICF as well as any wall framing which may be on that layer. Is there a way to handle this in not too a complicated manner?