diff --git a/Classes/Controller/AbstractController.php b/Classes/Controller/AbstractController.php
index d2a7f25eb..6f9159d48 100644
--- a/Classes/Controller/AbstractController.php
+++ b/Classes/Controller/AbstractController.php
@@ -276,6 +276,55 @@ protected function sanitizeRequestData(): void
         $this->requestData['double'] = MathUtility::forceIntegerInRange($this->requestData['double'] ?? 0, 0, 1);
     }
 
+    /**
+     * Sanitize settings from FlexForm.
+     *
+     * @access protected
+     *
+     * @return void
+     */
+    protected function sanitizeSettings(): void
+    {
+        $this->setDefaultIntSetting('storagePid', 0);
+
+        if ($this instanceof MetadataController) {
+            $this->setDefaultIntSetting('rootline', 0);
+            $this->setDefaultIntSetting('originalIiifMetadata', 0);
+            $this->setDefaultIntSetting('displayIiifDescription', 1);
+            $this->setDefaultIntSetting('displayIiifRights', 1);
+            $this->setDefaultIntSetting('displayIiifLinks', 1);
+        }
+
+        if ($this instanceof OaiPmhController) {
+            $this->setDefaultIntSetting('limit', 5);
+            $this->setDefaultIntSetting('solr_limit', 50000);
+        }
+
+        if ($this instanceof PageViewController) {
+            $this->setDefaultIntSetting('useInternalProxy', 0);
+        }
+    }
+
+    /**
+     * Sets default value for setting if not yet set.
+     *
+     * @access protected
+     *
+     * @param string $setting name of setting
+     * @param int $value for being set if empty
+     *
+     * @return void
+     */
+    protected function setDefaultIntSetting(string $setting, int $value): void
+    {
+        if (empty($this->settings[$setting])) {
+            $this->settings[$setting] = $value;
+            $this->logger->warning('Setting "' . $setting . '" not set, using default value "' . $value . '". Probably FlexForm for controller "' . get_class($this) . '" is not read.');
+        } else {
+            $this->settings[$setting] = (int) $this->settings[$setting];
+        }
+    }
+
     /**
      * Sets page value.
      *
@@ -533,7 +582,7 @@ protected function getDocumentByUrl(string $documentId)
 
             // Make sure configuration PID is set when applicable
             if ($doc->cPid == 0) {
-                $doc->cPid = max((int) $this->settings['storagePid'], 0);
+                $doc->cPid = max($this->settings['storagePid'], 0);
             }
 
             $this->document->setLocation($documentId);
diff --git a/Classes/Controller/MetadataController.php b/Classes/Controller/MetadataController.php
index 1fa0138f9..a8b45f152 100644
--- a/Classes/Controller/MetadataController.php
+++ b/Classes/Controller/MetadataController.php
@@ -107,16 +107,10 @@ public function mainAction(): void
         if ($this->isDocMissing()) {
             // Quit without doing anything if required variables are not set.
             return;
-        } else {
-            // Set default values if not set.
-            $this->setDefault('rootline', 0);
-            $this->setDefault('originalIiifMetadata', 0);
-            $this->setDefault('displayIiifDescription', 1);
-            $this->setDefault('displayIiifRights', 1);
-            $this->setDefault('displayIiifLinks', 1);
-            $this->setPage();
         }
 
+        $this->setPage();
+
         $this->currentDocument = $this->document->getCurrentDocument();
         $this->useOriginalIiifManifestMetadata = $this->settings['originalIiifMetadata'] == 1 && $this->currentDocument instanceof IiifManifest;
 
@@ -529,21 +523,4 @@ private function getMetadataForIds(array $id, array $metadata): array
         }
         return $metadata;
     }
-
-    /**
-     * Sets default value for setting if not yet set.
-     *
-     * @access private
-     *
-     * @param string $setting name of setting
-     * @param int $value 0 or 1
-     *
-     * @return void
-     */
-    private function setDefault(string $setting, int $value): void
-    {
-        if (!isset($this->settings[$setting])) {
-            $this->settings[$setting] = $value;
-        }
-    }
 }
diff --git a/Classes/Controller/OaiPmhController.php b/Classes/Controller/OaiPmhController.php
index 81c7430ef..e55b8ede5 100644
--- a/Classes/Controller/OaiPmhController.php
+++ b/Classes/Controller/OaiPmhController.php
@@ -645,8 +645,8 @@ protected function fetchDocumentSet(): array
             $this->logger->error('Apache Solr not available');
             return $documentSet;
         }
-        if ((int) $this->settings['solr_limit'] > 0) {
-            $solr->limit = (int) $this->settings['solr_limit'];
+        if ($this->settings['solr_limit'] > 0) {
+            $solr->limit = $this->settings['solr_limit'];
         }
         // We only care about the UID in the results and want them sorted
         $parameters = [
@@ -785,7 +785,7 @@ private function checkGranularity(): void
      */
     protected function generateOutputForDocumentList(array $documentListSet)
     {
-        $documentsToProcess = array_splice($documentListSet['elements'], 0, (int) $this->settings['limit']);
+        $documentsToProcess = array_splice($documentListSet['elements'], 0, $this->settings['limit']);
         if (empty($documentsToProcess)) {
             $this->error = 'noRecordsMatch';
             return [];
diff --git a/Classes/Controller/PageViewController.php b/Classes/Controller/PageViewController.php
index 8fe4a01e8..78b830535 100644
--- a/Classes/Controller/PageViewController.php
+++ b/Classes/Controller/PageViewController.php
@@ -503,7 +503,7 @@ protected function addViewerJS(): void
                         'score' => $docScore,
                         'annotationContainers' => $docAnnotationContainers,
                         'measureCoords' => $docMeasures['measureCoordsCurrentSite'],
-                        'useInternalProxy' => $this->settings['useInternalProxy'] ? 1 : 0,
+                        'useInternalProxy' => $this->settings['useInternalProxy'],
                         'currentMeasureId' => $currentMeasureId,
                         'measureIdLinks' => $docMeasures['measureLinks']
                     ];
@@ -539,7 +539,7 @@ protected function addViewerJS(): void
                 'score' => $this->scores,
                 'annotationContainers' => $this->annotationContainers,
                 'measureCoords' => $docMeasures['measureCoordsCurrentSite'],
-                'useInternalProxy' => $this->settings['useInternalProxy'] ? 1 : 0,
+                'useInternalProxy' => $this->settings['useInternalProxy'],
                 'verovioAnnotations' => $this->verovioAnnotations,
                 'currentMeasureId' => $currentMeasureId,
                 'measureIdLinks' => $docMeasures['measureLinks']