Further refinements to TC_Geom_BoundingBox.
Further refinements to TC_Geom_BoundingBox.

thomthom/testup-2,SketchUp/testup-2,economysizegeek/testup-2,SketchUp/testup-2,SketchUp/testup-2,SketchUp/testup-2,SketchUp/testup-2,SketchUp/testup-2,thomthom/testup-2,thomthom/testup-2,economysizegeek/testup-2,thomthom/testup-2,thomthom/testup-2,economysizegeek/testup-2,thomthom/testup-2,economysizegeek/testup-2