The spiral markings on the Vajra are old hat, I read that somewhere else a while back (wikipedia?).
They certainly seem related though. How is a mystery to me. Also do Vajras have pilots? And more importantly what are their motives?
It does seem the Protoculture made a lot of mistakes though, but al least they're not around to clean them up like the precursors of Stargate, who would let the entire galaxy get destroyed.
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