Tell me about that, I bought a 4rd gen cast two weeks ago with no shrinkage resin (and I'm really happy about that) for almost the same price. Two weeks earlier and I might have bought an RS cast (in fact I asked them if something was on the works and they did not have anything yet).
Well, it'll be my last helmet, with real found parts and archive-x paints, so I won't bother about it being a 4rd instead of a 2nd.