If "reversed normals" means that the vertexes in any facec are clockwise when seen from outside, Larry Weinberg could try programming this feature in: Let the user select a face which is the right way out. Then go to all faces which are adjacent to that face along an ordinary edge where 2 and no more than 2 meet; if any of those faces are the opposite way round to the original face, reverse the order of the vertexes. Do the same with the faces adjacent to those, and repeat until you can't get any further. I wrote this feature into a mesh-handling program that I wrote for myself, and it is useful. all disarranged vertex-orders put right without having to ferret for them.