Another Simple Script.
Use case:
The physical state of the controllers is your main concern.
"Mirroring" the limbs, to turn a "left-handed" pose into a "right-handed" pose is your main objective.
Quickness / "real time" swap.
Non-Use case:
Physical state is not your concern (other solutions...
AshAuryn's Creator Tools
174 Morph Expansion - Mouth Asymmetry
Note: Special thanks to @FantasiWrapper and @Gabberjaw for alerting me to upper teeth deformation issues, and to @MrGiggly for providing the fix!
174 Left/Right Asymmetry Morphs for the Mouth. Create your own unique expressions...