I've noticed a litle rust on my 2012 battery pack a few years ago and mentioned it to the SC. "It's normal", they said "not a concern". Today I heard a flapping noise and looked under the card to see the glued-on black plastic was dangling off the sides of the battery- apparently the glue is sticking to the metal, but the metal rusted through/off. Ironically, the rest of the battery pack is not rusting, just the perforated rails that run from front to back on each side of the battery under the car. Anyone else see this issue? I'm thinking of sandblasting the metal and painting it. but it looks like it's just going to rust through again - looks like water gets in through the perforations above and it rusts through from the top.