diff --git a/application/AddressDB/AddressDB.php b/application/AddressDB/AddressDB.php
index 36348001a..d0645743a 100644
--- a/application/AddressDB/AddressDB.php
+++ b/application/AddressDB/AddressDB.php
@@ -149,7 +149,11 @@ class AddressDB {
         $log = mfLoghandler::singleton();
         $log->debug(__METHOD__.": =============================== in handleRimoStatusUpdate");
 
-        $wohneinheit = new ADBWohneinheit($wohneinheit_id);
+        $wohneinheit = mfValuecache::singleton()->get("mfObjectmodel-adb_wohneinheit-$wohneinheit_id");
+        if(!$wohneinheit) {
+            $wohneinheit = new ADBWohneinheit($wohneinheit_id);
+            if($wohneinheit->id) mfValuecache::singleton()->set("mfObjectmodel-adb_wohneinheit-$wohneinheit_id", $wohneinheit);
+        }
         if(!$wohneinheit->id) {
             //echo "no wohneinheit\n";
             return false;
diff --git a/application/AddressDB/AddressDBController.php b/application/AddressDB/AddressDBController.php
index c491cf599..f8e5d4dc4 100644
--- a/application/AddressDB/AddressDBController.php
+++ b/application/AddressDB/AddressDBController.php
@@ -999,6 +999,9 @@ class AddressDBController extends mfBaseController {
       case 'findBuildings':
         $return = $this->findBuildingsApi();
         break;
+      case 'countWithFilter':
+        $return = $this->countWithFilter();
+        break;
       case 'getUnit':
         $return = $this->getUnitApi();
         break;
@@ -1020,6 +1023,14 @@ class AddressDBController extends mfBaseController {
     $this->returnJson($data);
   }
 
+
+  private function countWithFilter() {
+      $filter = $this->getPreparedFilter($this->request->filter);
+      $filter["netzgebiet_id"] = true;
+
+      return ["count" => ADBHausnummerModel::count($filter)];
+  }
+
     private function updateAddressStatusApi() {
         $address_id = $this->request->id;
 
diff --git a/application/Preorder/Preorder.php b/application/Preorder/Preorder.php
index a351598bc..b52634dfa 100644
--- a/application/Preorder/Preorder.php
+++ b/application/Preorder/Preorder.php
@@ -41,6 +41,11 @@ class Preorder extends mfBaseModel {
         if($this->uid === "string") {
             $this->uid = "";
         }
+
+        if($this->id) {
+            //echo "[{$this->_ruid}] preorder::afterload: adding to cache\n";
+            mfValuecache::singleton()->set("mfObjectmodel-preorder-" . $this->id, $this);
+        }
     }
 
     public function beforeSave($_params = []) {
@@ -57,6 +62,7 @@ class Preorder extends mfBaseModel {
         $this->building = null;
         $this->adb_hausnummer = null;
         $this->adb_wohneinheit = null;
+        $this->attribute = null;
         $this->services = null;
         $this->ordered_services = null;
         $this->creator = null;
@@ -475,7 +481,11 @@ class Preorder extends mfBaseModel {
             return true;
         }
 
-        $hausnummer = new ADBHausnummer($this->adb_hausnummer_id);
+        $hausnummer = mfValuecache::singleton()->get("mfObjectmodel-adb_hausnummer-" . $this->adb_hausnummer_id);
+        if(!$hausnummer) {
+            $hausnummer = new ADBHausnummer($this->adb_hausnummer_id);
+            if($hausnummer->id) mfValuecache::singleton()->set("mfObjectmodel-adb_hausnummer-".$this->adb_hausnummer_id, $hausnummer);
+        }
         if(!$hausnummer->id) {
             $this->log->warning("[".$this->_ruid."] ".__METHOD__ . ": hausnummer " . $this->adb_hausnummer_id . " not found!");
             return true;
@@ -519,7 +529,11 @@ class Preorder extends mfBaseModel {
                 return true;
             }
 
-            $wohneinheit = new ADBWohneinheit($this->adb_wohneinheit_id);
+            $wohneinheit = mfValuecache::singleton()->get("mfObjectmodel-adb_wohneinheit-" . $this->adb_wohneinheit_id);
+            if(!$wohneinheit) {
+                $wohneinheit = new ADBwohneinheit($this->adb_wohneinheit_id);
+                if($wohneinheit->id) mfValuecache::singleton()->set("mfObjectmodel-adb_wohneinheit-".$this->adb_wohneinheit_id, $wohneinheit);
+            }
             if(!$wohneinheit->id) return true;
 
             $this->log->debug("[".$this->_ruid."] ".__METHOD__ . ": new wohneinheit status code " . $new_wohneinheit_status->code);
@@ -536,6 +550,24 @@ class Preorder extends mfBaseModel {
         if(is_array($flags) && count($flags)) {
             foreach($flags as $flag) {
                 if(strlen($flag->value->value) && array_key_exists($flag->code, TT_PREORDER_STATUS_FLAG_MATRIX)) {
+
+                    if($flag->code == "145") {
+                        //echo "flag 145\n";
+                        $attribs = $this->getProperty("attribute");
+                        if(!is_array($attribs)) {
+                            $attribs = [];
+                        }
+
+                        if(!array_key_exists("inhouse_cabling_supplied", $attribs) || $attribs["inhouse_cabling_supplied"] != $flag->value->value) {
+                            $attribs["inhouse_cabling_supplied"] = (int)$flag->value->value;
+                            //echo "[{$this->_ruid}] preorder::aftersave: updating attrib to ".(int)$flag->value->value."\n";
+                            $this->attributes = json_encode($attribs);
+                            $this->save(["no_aftersave" => true]);
+                            //print_r($this->attributes);echo "\n";
+                        }
+                    }
+
+
                     $flag_matrix_item = TT_PREORDER_STATUS_FLAG_MATRIX[$flag->code];
                     if(!$flag_matrix_item["flag"]) continue;
 
@@ -1051,7 +1083,7 @@ class Preorder extends mfBaseModel {
     public function setStatusFlag($code, $value = 1) {
         if(!$code) return false;
 
-        $sflag = PreorderstatusflagModel::getFirst(["code" => $code]);
+        $sflag = PreorderStatusflagModel::getFirst(["code" => $code]);
         if(!$sflag) return false;
 
         $sflag->preorder_id = $this->id;
@@ -1503,12 +1535,28 @@ class Preorder extends mfBaseModel {
             }
 
             if($name == "adb_hausnummer") {
-                $this->adb_hausnummer = new ADBHausnummer($this->adb_hausnummer_id);
+                $hausnummer = mfValuecache::singleton()->get("mfObjectmodel-adb_hausnummer-" . $this->adb_hausnummer_id);
+                if(!$hausnummer) {
+                    $hausnummer = new ADBHausnummer($this->adb_hausnummer_id);
+                }
+                if($hausnummer && $hausnummer->id) {
+                    mfValuecache::singleton()->set("mfObjectmodel-adb_hausnummer-" . $this->adb_hausnummer_id, $hausnummer);
+                    $this->adb_hausnummer = $hausnummer;
+                }
+
                 return $this->adb_hausnummer;
             }
 
             if($name == "adb_wohneinheit") {
-                $this->adb_wohneinheit = new ADBWohneinheit($this->adb_wohneinheit_id);
+                $wohneinheit = mfValuecache::singleton()->get("mfObjectmodel-adb_wohneinheit-" . $this->adb_wohneinheit_id);
+                if(!$wohneinheit) {
+                    $wohneinheit = new ADBWohneinheit($this->adb_wohneinheit_id);
+                }
+                if($wohneinheit && $wohneinheit->id) {
+                    mfValuecache::singleton()->set("mfObjectmodel-adb_wohneinheit-" . $this->adb_wohneinheit_id, $wohneinheit);
+                    $this->adb_wohneinheit = $wohneinheit;
+                }
+
                 return $this->adb_wohneinheit;
             }
 
diff --git a/application/Preorder/PreorderModel.php b/application/Preorder/PreorderModel.php
index 32321710e..3fd20ee5f 100644
--- a/application/Preorder/PreorderModel.php
+++ b/application/Preorder/PreorderModel.php
@@ -267,6 +267,13 @@ class PreorderModel
 
         if ($db->num_rows($res)) {
             $data = $db->fetch_object($res);
+
+            // search in cache
+            $item = mfValuecache::singleton()->get("mfObjectmodel-preorder-".$data->id);
+            if($item) {
+                return $item;
+            }
+            // if not in cache, load regularly
             $item = new Preorder($data);
             if ($item->id) {
                 return $item;
@@ -559,7 +566,12 @@ class PreorderModel
                 if ($returnArray) {
                     $items[] = $data;
                 } else {
-                    $items[] = new Preorder($data);
+                    $item = mfValuecache::singleton()->get("mfObjectmodel-preorder-".$data->id);
+                    if($item) {
+                        $items[] = $item;
+                    } else {
+                        $items[] = new Preorder($data);
+                    }
                 }
             }
         }
diff --git a/application/PreorderStatusflagValue/PreorderStatusflagValue.php b/application/PreorderStatusflagValue/PreorderStatusflagValue.php
index f4c77e1c1..f41db1b8d 100644
--- a/application/PreorderStatusflagValue/PreorderStatusflagValue.php
+++ b/application/PreorderStatusflagValue/PreorderStatusflagValue.php
@@ -4,6 +4,7 @@ class PreorderStatusflagValue extends mfBaseModel {
     private $preorder;
 
     protected function afterSave() {
+        //echo __METHOD__."\n";
         if(!property_exists($this->_old_data, "value") || $this->_old_data->value != $this->data->value) {
             $history = PreorderHistoryModel::create([
                 "preorder_id" => $this->data->preorder_id,
@@ -15,7 +16,10 @@ class PreorderStatusflagValue extends mfBaseModel {
             $history->save();
 
         }
-        $this->getProperty("preorder")->afterSave();
+
+        $preorder = $this->getProperty("preorder");
+        //echo "[{$preorder->_ruid}] flagvalue aftersave: loaded preorder\n";
+        $preorder->afterSave();
     }
 
     public function getProperty($name) {
@@ -23,6 +27,7 @@ class PreorderStatusflagValue extends mfBaseModel {
 
             $classname = ucfirst($name);
             $idfield = $name."_id";
+            //var_dump(mfValuecache::singleton()->cache["mfObjectmodel-$name-".$this->$idfield]);exit;
             $this->$name = mfValuecache::singleton()->get("mfObjectmodel-$name-".$this->$idfield);
             if(!$this->$name) {
                 $this->$name = new $classname($this->$idfield);