Oh right, generally i just hand plot the levels off a surveyors/architects drawings, a bit old fashioned i know but I find it better to work with if i can plan it from scratch so the fewer node points the better for me. If i could place a simple point in moi with a z-height that would pull the mesh up to that point I would be happy to just plot each spot level by hand, which doesn't take that long when you just plough on with it.