Custom mouth mesh

[Beard of Socrates]

Hey all I'm trying to make a custom mouth for a head mesh. The vanilla mouth clips with the head, so I need to reduce the overall size of it.

 

What I did.

1. Imported the nif into blender

2. Made a quick edit

3. Extracted the TRI and EGM, renaming them to the new mouth

4. Opened up Geck and the mouth is no where in site?

 

Thanks for any tips you have!