I just noticed that one of my original volcano tubetank endcaps with the chrome finish is pitting. The chrome is starting to flake off on the part where the inner o-ring meets the cartomizer. This has got me wondering how well does the anodized aluminum endcaps from ibtanked hold up over time. I know aluminum is a soft metal and will easily oxidize. I was just going to order a bunch of new tanks but don't want to get an aluminum one if it doesn't last.