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Causality,

I believe that's how most of our collections began. "Every time I go looking for a razor it seems like I find a new company I hadn't heard of". That's certainly the case with me.
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Well, you're looking at SRD and the honing is an added bonus.

So....why don't you stay with SRD for the time being. Take the stress of "learning about old blades" out of the equation...