I know Barnbaum advocates placing shadows on Zone IV, and also cutting the ASA in half for standard developers. So, he is essentially saying, "for an ASA 400 film, set your meter on ASA 100, and place the shadows on Zone III." From there, you would want to develop a Normal neg so that you maintain the same optical density spread between Zones III and VIII, which is 0.91, only now your Zone III is around .54, Zone VIII is around 1.45, giving you tons of shadow detail. I am testing several films (TX400, HP5, and TMY, FP4) with XTOL, and I was wondering if this technique would lead to blocked highlights. Barnbaum says most modern films don't shoulder off, but I figured I'd ask the experts.