This is incredible, thank you!
I am having an issue though. It seems to get confused when there are multiple clothing items with this plugin added as a Stopper clothing plugin. I'm trying to use this to manage three piercings (from Qdaro's pack), but when I add the third plugin instance, the second clothing item's CUA disappears. Reload the preset from the second item's ClothingPluginManager, and then the third CUA disappears....
Ah, okay, it seems to be because of the way this plugin is naming the CUA atom it spawns. It looks like the name is dependent on the person atom ID and the plugin index, but since you can have a separate plugin manager for each clothing item, you can have multiple plugin instances with the same index in their respective plugin managers. My first clothing item doesn't collide with the other two because its SkinVertexLink is plugin#3, but the other two are fighting for the plugin#2 slot.
Edit: I was able to work around it by adding blank plugin slots to the manager until I got to a unique index, assigning a SkinVertexLink to the unique slot, and then deleting the empty slots and re-saving the preset.