They're probably talking about the black oxide coated QA1 rod ends on the V2s. The V1s used black oxide coated cap screws which would rust easily. The rods on the V2s at least are anodized aluminum... it won't ever "rust," but could corrode some(not likely, and it would not look like rust).
Looking at the design, I'm guessing V2 owners can't upgrade to the V3 stuff.
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