was explained by lee on another thread, i believe the 2008 spec B4 doesn't have the unobtanium coated shafts, as they found that the coating can wear and become 'notchy' which killed off o rings and made for leaky shocks, so the latest spec b4's have the older shafts on them.
If however you have something labelled as unobtanium shafts which are gold i'm not sure whats going on, maybe the changed the actual coating instead of using the 'softer' shafts?
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