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Thanks for the big awesome paragraph of feedback.
With the hair i could just make it longer so it reaches the ground, but i was wanting to ask your advice on modifying the chin.

I wanted to keep a sharp jawline, so what would you advise I do to better ready my work for print?
should I segment it? D
Does segmenting potentially make more problems than it creates?

Sorry for the 20 questions, I'm just mad keen, but also 3dprinter-less.