diff --git a/CRM/TwingleCampaign/BAO/TwingleProject.php b/CRM/TwingleCampaign/BAO/TwingleProject.php
index 7ec5289..2dcfd68 100644
--- a/CRM/TwingleCampaign/BAO/TwingleProject.php
+++ b/CRM/TwingleCampaign/BAO/TwingleProject.php
@@ -2,8 +2,6 @@
 
 use CRM_TwingleCampaign_Utils_ExtensionCache as Cache;
 use CRM_TwingleCampaign_BAO_Campaign as Campaign;
-use CRM_TwingleCampaign_ExtensionUtil as E;
-use CRM_TwingleCampaign_BAO_TwingleApiCall as TwingleApiCall;
 
 
 class CRM_TwingleCampaign_BAO_TwingleProject extends Campaign {
@@ -14,14 +12,12 @@ class CRM_TwingleCampaign_BAO_TwingleProject extends Campaign {
    * @param array $project
    * Result array of Twingle API call to
    * https://project.twingle.de/api/by-organisation/$organisation_id
-   *
    * @param int|null $id
    *
    */
   public function __construct(array $project, int $id = NULL) {
-    parent::__construct($project);
+    parent::__construct($project, $id);
 
-    $this->id = $id;
     $this->prefix = 'twingle_project_';
     $this->values['campaign_type_id'] = 'twingle_project';
     $this->id_custom_field = Cache::getInstance()
@@ -67,7 +63,6 @@ class CRM_TwingleCampaign_BAO_TwingleProject extends Campaign {
    * @return bool
    * Returns a boolean
    *
-   * @throws \CiviCRM_API3_Exception
    * @throws \Exception
    */
   public function create(bool $no_hook = FALSE): bool {
@@ -106,8 +101,7 @@ class CRM_TwingleCampaign_BAO_TwingleProject extends Campaign {
       return TRUE;
     }
     else {
-      $errorMessage = $result['error_message'];
-      throw new Exception("$errorMessage");
+      throw new Exception($result['error_message']);
     }
   }
 
@@ -230,8 +224,8 @@ class CRM_TwingleCampaign_BAO_TwingleProject extends Campaign {
   /**
    * Get a response that describes the status of a TwingleProject
    *
-   * @param string $status
-   * status of the TwingleProject you want the response for
+   * @param string|null $status
+   * status of the TwingleProject you want to give back along with the response
    *
    * @return array
    * Returns a response array that contains title, id, project_id and status
diff --git a/api/v3/TwingleProject/Sync.php b/api/v3/TwingleProject/Sync.php
index e3904d5..aad16c7 100644
--- a/api/v3/TwingleProject/Sync.php
+++ b/api/v3/TwingleProject/Sync.php
@@ -46,7 +46,16 @@ function _civicrm_api3_twingle_project_Sync_spec(array &$spec) {
 
 
 /**
- * TwingleProject.Sync API
+ * # TwingleProject.Sync API
+ *
+ * Synchronize one ore more campaigns of the type TwingleProject between CiviCRM
+ * and Twingle.
+ *
+ * * If you pass an **id** or **project_id** parameter, *only one project* will
+ * be synchronized.
+ *
+ * * If you pass no **id** or **project_id** parameter, *all projects* will be
+ * synchronized.
  *
  * @param array $params
  *
@@ -215,21 +224,23 @@ function civicrm_api3_twingle_project_Sync(array $params): array {
     foreach ($projects_from_civicrm['values'] as $project_from_civicrm) {
       foreach ($projects_from_twingle as $project_from_twingle) {
         if ($project_from_twingle['id'] == $project_from_civicrm['project_id']) {
+
           // store campaign id in $id
           $id = $project_from_civicrm['id'];
           unset($project_from_civicrm['id']);
+
           // instantiate project with values from TwingleProject.Get
           $project = new TwingleProject($project_from_civicrm, $id);
+
           // sync project
           $result = sync($project, $project_from_twingle, $twingleApi, $params);
           if ($result['is_error'] != 0) {
             $errors_occurred++;
             $result_values[$project->getId()] =
               $project->getResponse($result['error_message']);
-
           }
           else {
-            $result_values[$project->getId()] = $result['values'];
+            $result_values[$project->getId()] = $result['values'][0];
           }
           break;
         }
@@ -291,29 +302,18 @@ function updateLocally(array $project_from_twingle,
       );
     }
     // ... else, update local TwingleProject campaign
-    try {
-      $project->create(TRUE);
-      return civicrm_api3_create_success(
-        $project->getResponse('TwingleProject updated successfully'),
-        $params,
-        'TwingleProject',
-        'Sync'
-      );
-    } catch (Exception $e) {
-      $errorMessage = $e->getMessage();
-      Civi::log()->error(
-        "$extensionName could not update TwingleProject: $errorMessage",
-        $project->getResponse()
-      );
-      return civicrm_api3_create_error(
-        "TwingleProject could not get updated: $errorMessage",
-        $project->getResponse()
-      );
-    }
+    $project->create(TRUE);
+    return civicrm_api3_create_success(
+      $project->getResponse('TwingleProject updated successfully'),
+      $params,
+      'TwingleProject',
+      'Sync'
+    );
   } catch (Exception $e) {
     $errorMessage = $e->getMessage();
     Civi::log()->error(
-      "$extensionName could not update TwingleProject campaign: $errorMessage"
+      "$extensionName could not update TwingleProject campaign: $errorMessage",
+      $project->getResponse()
     );
     return civicrm_api3_create_error(
       "Could not update TwingleProject campaign: $errorMessage",
@@ -437,8 +437,9 @@ function sync(TwingleProject $project,
 
   // If both versions are still synchronized
   else {
+    $response[] = $project->getResponse('TwingleProject up to date');
     return civicrm_api3_create_success(
-      $project->getResponse('TwingleProject up to date'),
+      $response,
       $params,
       'TwingleProject',
       'Sync'