Mercury invites all of the girls out for the experiment. Why Alice is naked is not important.
Link is called in to do the deed. Figure headswaps always come at a price!
Now we can get started.
While incredibly loose, the S.H. Figuarts head fits on a figma body (or at least Momo's does)
The other way around however doesn't fit. I can't get either the figma or revoltech head on the S.H. Figuarts body (again this could be Momo specific, but I'm pretty sure it will extend to the others).
Lesson learned, S.H. Figuarts fits on Figmas, but Figmas won't fit on S.H. Figuarts. This could be solved by customizing the figma neck joint, but I'll leave that to a more adventurous collector than me. Thanks for reading!