Quote - "As far as I know, she does, but the gimbal system isn't Poser only."

Well said and thank you for reminding me.

As for the bone hierarchy,  does Dawn have the left/right breast and/or left/right buttock?

No. Her breasts are part of Chest 2, her upper rear/lower back are part of Hip, and the more fleshy lower portion of her 'cheeks' are on Pelvis.

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Daz, Blender, Affinity, Substance, Unity, Python, C#