I have a Vari X (not a I,II, or III) 3X9 scope that dates back to the 60's and parts of it have turned a plum color. Does anyone have any warranty experience with Leupold regarding this or know what Leupold's position on this is? I've talked with them over the phone and all they will say is send it in and we'll take a look at it. They wouldn't acknowledge that this is a common problem that everyone seems to know about but them. I just hate to waste my time if they won't do anything about it.