Possibly the issue is that this model has a default `name` value of "Smartgraph Range Question" defined. But that's an instance attribute, not a class attribute.

I wasn't able to find `display_name` being used for probe/sensor usage, but it's entirely likely that one of the helpers which calls `display_name` is involved and thereby throwing me off the scent. I think keeping `display_name` as

    def display_name
      self.model_name.human.titlecase
    end

is reasonable, because it gets done what we want (removes the calls to `local_name_for`) without breaking other code (e.g. custom `display_name` settings).