Ahhhhh Perfect. I'll look into that. Sounds like that would work perfectly for the controllers I most want to do this with.
However, I also have something that I think might be a good idea which is a collection of stimulus controllers but also come concerns that allow someone to suggest changes to the attributes of a model (they are included into) and for another to accept or reject the changes depending on their 'expert' consideration. Maybe that is something of a special case.