Sue, that is pretty dramatic. Something must have happened to your cladding because with such limited numbers of the VX being made I just can't believe that they would go through the trouble of making two shades of cladding. Of course I have been wrong before......but I was wrong about that.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless