Those big eyebrows are actually part of M3, yes. :)  Usually you don't see them in Poser because the material applied has transparency.  I wouldn't worry about them, but you should probably include them in your morphs as they are part of the head.

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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