First of all I want to say that im really happy that you are posting pictures from the mould to, that will really help me understanding how you get the mask hollow.
now a question: you have sculped teeth, but you now want to use the screen used teeth, witch I understand, but are you sure they have the right size, I mean you could have made your sculp smaller then the screen used head? Also, do you have to remove the teeth on your sculp now and resculp the area with the new teeth?
Just post pictures of everything,thats what im trying to say