O.k., here's one for the pros out there. I wasted a day trying to do this. I have a ramp that is curving in plan (in various directions, like a winding path) as well as increasing in height at various rates along it's length. I've tried to extrude along a carefully mapped path, but evidently you can't extrude to a nurbs curve that is nonplanar. Using the 3d reshaping tool is just not accurrate enough. I even tried turning my nonplanar path into a helix-spiral, which at least let me extrude