diff --git a/README.md b/README.md
index d555ba6..6d3cc7c 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,24 @@
 # Child Publisher
 
-An ArchivesSpace plugin that adds the ability to publish and unpublish all child records of an archival object.
+An ArchivesSpace plugin that adds the ability to publish and unpublish all child
+records of an archival object.
 
-Developed against ArchivesSpace v2.4.0 by Hudson Molonglo for Yale University.
+Developed against ArchivesSpace v2.7.1 by Hudson Molonglo for Yale University.
 
 
 ## Summary
 
-Two new options are available in the `More` menu on the component toolbar for components that have children - `Publish this and all children` and `Unpublish all children`. When selected, all child components of the current component will be published or unpublished respectively.
+Two new options are available in the `More` menu on the component toolbar for
+components that have children - `Publish this and all children` and
+`Unpublish all children`. When selected, all child components of the current
+component will be published or unpublished respectively.
 
-In the case of publication the current record is also published. When unpublishing the published state of the current component and its nested records is unchanged.
+In the case of publication the current record is also published. When
+unpublishing the published state of the current component and its nested records
+is unchanged.
 
-The published state of some `Note` records attached to child components is also unchanged.
+The published state of some `Note` records attached to child components is also
+unchanged.
 
 Currently, this filtering is not configurable.
 
@@ -20,28 +27,20 @@ Currently, this filtering is not configurable.
 
 Follow standard ArchivesSpace plugin installation procedures.
 
-This plugin is not dependent on any additional gems, does not require any database migrations, and does not override any existing templates.
-
-It does override some backend methods, see below.
+This plugin is not dependent on any additional gems, does not require any
+database migrations, and does not override any existing templates.
 
 
 ## Customization
 
-To enable the filtering mentioned above this plugin overrides two backend methods, namely:
-
-  - `ObjectGraph.calculate_object_graph(object_graph, opts = {})`
-  - `Notes.calculate_object_graph(object_graph, opts = {})`
-
-These methods have been changed to accept `opts` keyed on a model with a value that is a Sequel dataset on that model. They allow for filtering of nested records and notes respectively.
-
-There are other implementations of `calculate_object_graph(object_graph, opts = {})` that have not yet been overridden to support filtering with opts like this - the goal was to override as little as possible.
-
-To customize the filtering behavior, call `ChildPublishing.add_filter(filter)`. For example:
+To customize the filtering behavior, call `ChildPublishing.add_filter(filter)`.
+For example:
 
 ```ruby
     # turn off the default note filtering
     ChildPublishing.add_filter(Note)
 ```
 
-See [here](https://github.com/hudmol/child_publisher/blob/master/backend/plugin_init.rb) for the call that sets the Note filter.
+See [here](https://github.com/hudmol/child_publisher/blob/master/backend/plugin_init.rb)
+for the call that sets the Note filter.
 
diff --git a/backend/model/ASModel_object_graph.rb b/backend/model/ASModel_object_graph.rb
deleted file mode 100644
index 3551d4a..0000000
--- a/backend/model/ASModel_object_graph.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-module ObjectGraph
-  module ClassMethods
-
-    def calculate_object_graph(object_graph, opts = {})
-
-      object_graph.models.each do |model|
-        next unless model.respond_to?(:nested_records)
-        model.nested_records.each do |nr|
-          association =  nr[:association]
-
-          if association[:type] != :many_to_many
-            nested_model = Kernel.const_get(association[:class_name])
-
-            ids = (opts[nested_model] || nested_model).filter(association[:key] => object_graph.ids_for(model)).
-                                                       select(:id).map {|row|
-              row[:id]
-            }
-
-            object_graph.add_objects(nested_model, ids)
-          end
-        end
-      end
-
-      object_graph
-    end
-
-  end
-
-end
diff --git a/backend/model/mixins/notes.rb b/backend/model/mixins/notes.rb
deleted file mode 100644
index a38d958..0000000
--- a/backend/model/mixins/notes.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-module Notes
-  module ClassMethods
-    def calculate_object_graph(object_graph, opts = {})
-      super
-
-      column = "#{self.table_name}_id".intern
-
-      ids = (opts[Note] || Note).filter(column => object_graph.ids_for(self)).
-        map {|row| row[:id]}
-
-      object_graph.add_objects(Note, ids)
-    end
-  end
-end