I have selected systems in the "Project Defaults" tab for Roof, Exterior Wall and Slab on Grade. My model seems to import just fine when I do a project run except it uses the exterior walls system I selected for the roofs and slab on grade systems as well. For example, if I have selected R19 Metal Frame for exterior walls...it uses it for the roof and slab as well. I have a simple box(slab, four walls, roof, single room to underside of roof). I'm not sure if this is enough information to understand my question, but does anyone have any ideas on how I can make it use the default systems?