diff --git a/src/CampaignAdmin.php b/src/CampaignAdmin.php
index 51465c6..6beee43 100644
--- a/src/CampaignAdmin.php
+++ b/src/CampaignAdmin.php
@@ -144,7 +144,7 @@ public function getClientConfig(): array
                 'url' => $this->Link('removeCampaignItem/:id/:itemId'),
                 'method' => 'post'
             ],
-            'treeClass' => $this->config()->get('model_class')
+            'treeClass' => $this->getModelClass()
         ]);
     }
 
@@ -234,8 +234,7 @@ protected function getListResource()
     {
         $items = $this->getListItems();
         $count = $items->count();
-        /** @var string $treeClass */
-        $treeClass = $this->config()->get('model_class');
+        $modelClass = $this->getModelClass();
         $hal = [
             'count' => $count,
             'total' => $count,
@@ -244,12 +243,12 @@ protected function getListResource()
                     'href' => $this->Link('items')
                 ]
             ],
-            '_embedded' => [$treeClass => []]
+            '_embedded' => [$modelClass => []]
         ];
         foreach ($items as $item) {
             $sync = $this->shouldCampaignSync($item);
             $resource = $this->getChangeSetResource($item, $sync);
-            $hal['_embedded'][$treeClass][] = $resource;
+            $hal['_embedded'][$modelClass][] = $resource;
         }
         return $hal;
     }
@@ -813,11 +812,11 @@ public function providePermissions()
         return array(
             "CMS_ACCESS_CampaignAdmin" => array(
                 'name' => _t(
-                    'SilverStripe\\CMS\\Controllers\\CMSMain.ACCESS',
+                    LeftAndMain::class . '.ACCESS',
                     "Access to '{title}' section",
                     array('title' => static::menu_title())
                 ),
-                'category' => _t('SilverStripe\\Security\\Permission.CMS_ACCESS_CATEGORY', 'CMS Access'),
+                'category' => _t(LeftAndMain::class . '.CMS_ACCESS_CATEGORY', 'CMS Access'),
                 'help' => _t(
                     __CLASS__.'.ACCESS_HELP',
                     'Allow viewing of the campaign publishing section.'
diff --git a/src/CampaignAdminList.php b/src/CampaignAdminList.php
index aeab18f..9f1b4bf 100644
--- a/src/CampaignAdminList.php
+++ b/src/CampaignAdminList.php
@@ -32,7 +32,7 @@ public function getSchemaDataDefaults()
 
         // Get endpoints from admin
         $admin = CampaignAdmin::singleton();
-        $data['data']['recordType'] = $admin->config()->uninherited('model_class');
+        $data['data']['recordType'] = $admin->getModelClass();
         $oneSetAction = $admin->Link("set") . "/:id";
         $setsAction = $admin->Link("sets");
         $schemaEndpoint = $admin->Link("schema") . "/DetailEditForm";