I tried it on a dial spun Morph++ character. I made the morph on a zero V4 and did the figure copy morph to the modified V4. It worked, but I guess it really depends on the design of the target character. V4's high smile always bugged me, too. BTW, I laughed out loud when you wrote how you checked your smile in the mirror. Good luck with this.

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W11,Intel i9-14900KF @ 3.20GHz, 64.0 GB RAM, 64-bit, GeForce GTX 4070 Ti SUPER, 16GB. 

Old lady hobbyist.

All visual art or fiction is "playing with dolls."