Update:
At the request, I made it possible to control Pose Morph with UI sliders and Timeline via HandMorhpManager.
Functionally, there is no difference from operating Pose Morph directly with Timeline etc., but I think that the work will be easier because the specified parameters are gathered...
This plugin is for swapping left and right poses.
-----------------------------------------------------------------------------------------------
Update (ver.5):
All pose morphs that have left and right sides, not just built-in hands, fingers, and feet, are now subject to left-right swapping...