In the case of this sculpt, we will make a two piece mold. Thus the seamstress form will come out unharmed and intact. When the two halves of the mold are complete, we crack it open like a nut shell, clean out the clay, than pour in the latex. We have done one piece molds before, but we didn't have a support structure underneath. An example of this is the THING character on our website. It was sculpted from 300 lbs of water clay.