Extruding is not the same thing as scaling. It's complicated to explain the difference (they are similar) so just trust us all that he is correct, what you would want to do is extrude the mesh and not simply scale it.
Oh, and thus Blitz's scaling works perfectly, it's just that scaling is not what you'd want in this situation.
Oh, and thus Blitz's scaling works perfectly, it's just that scaling is not what you'd want in this situation.