When a Model is inserted as a Cell, it would be good to include the Saved Views, which seem to saved to each Model.

Since the Saved View includes Ref attachment and level info, the embedded SV could be used to expand and/or change the Cell's contents on demand.

When creating the Model to be inserted as Cell, the user could store different configurations of the Cell's contents by displaying different levels, and/or Ref attachments by saving different SVs.

After the Cell is inserted, the SVs would be available in the Properties Panel as a property drop down. The user would select the desired SV to modify the Cell.