Jimmy, I'm not working with anyone. I love the feel of carbon steel, but I'm also committed to the specs you see above.
I submitted this question six and a half years ago thinking I might hear back from someone. Not hearing back from anyone, I just assumed that perhaps carbon steel was too heavy/dense to fashion an Anser-style head that was under 310g.
BTA, perhaps advancing metallurgical technology will now allow that option... ??