diff --git a/src/blackcore/db/airportdatareader.cpp b/src/blackcore/db/airportdatareader.cpp
index 1a6b732af..a3778e6c3 100644
--- a/src/blackcore/db/airportdatareader.cpp
+++ b/src/blackcore/db/airportdatareader.cpp
@@ -239,7 +239,7 @@ namespace BlackCore
             this->emitAndLogDataRead(CEntityFlags::AirportEntity, size, res);
         }
 
-        void CAirportDataReader::ps_read(CEntityFlags::Entity entity, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
+        void CAirportDataReader::read(CEntityFlags::Entity entity, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
         {
             this->threadAssertCheck();
             if (!this->doWorkCheck()) { return; }
diff --git a/src/blackcore/db/airportdatareader.h b/src/blackcore/db/airportdatareader.h
index 775ad0e65..e94629adb 100644
--- a/src/blackcore/db/airportdatareader.h
+++ b/src/blackcore/db/airportdatareader.h
@@ -69,11 +69,6 @@ namespace BlackCore
             virtual bool hasChangedUrl(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Network::CUrl &oldUrlInfo, BlackMisc::Network::CUrl &newUrlInfo) const override;
             virtual BlackMisc::Network::CUrl getDbServiceBaseUrl() const override;
 
-        private slots:
-            //! Read / re-read data file
-            void ps_read(BlackMisc::Network::CEntityFlags::Entity entity = BlackMisc::Network::CEntityFlags::DistributorLiveryModel,
-                         BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode = BlackMisc::Db::CDbFlags::DbReading, const QDateTime &newerThan = QDateTime());
-
         private:
             BlackMisc::CData<BlackCore::Data::TDbAirportCache> m_airportCache {this, &CAirportDataReader::airportCacheChanged}; //!< cache file
             std::atomic_bool m_syncedAirportCache { false }; //!< already synchronized?
@@ -81,6 +76,9 @@ namespace BlackCore
             //! Reader URL (we read from where?) used to detect changes of location
             BlackMisc::CData<BlackCore::Data::TDbModelReaderBaseUrl> m_readerUrlCache {this, &CAirportDataReader::baseUrlCacheChanged };
 
+            //! \copydoc CDatabaseReader::read
+            void read(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan) override;
+
             //! Parse downloaded JSON file
             void parseAirportData(QNetworkReply *nwReplyPtr);
 
diff --git a/src/blackcore/db/databasereader.cpp b/src/blackcore/db/databasereader.cpp
index 907448224..92ed9e58e 100644
--- a/src/blackcore/db/databasereader.cpp
+++ b/src/blackcore/db/databasereader.cpp
@@ -221,14 +221,13 @@ namespace BlackCore
             if (entities == CEntityFlags::NoEntity) { return; }
             if (!this->isInternetAccessible(QStringLiteral("No network/internet access, will not read %1").arg(CEntityFlags::flagToString(entities)))) { return; }
 
-            //! \todo MS 2018-12 Error: CDatabaseReader has no ps_read method -> T490
-            //! \todo KB 2018-12 https://dev.swift-project.org/T490
-            const bool s = QMetaObject::invokeMethod(this, "ps_read",
-                           Q_ARG(BlackMisc::Network::CEntityFlags::Entity, entities),
-                           Q_ARG(BlackMisc::Db::CDbFlags::DataRetrievalModeFlag, mode),
-                           Q_ARG(QDateTime, newerThan));
-            Q_ASSERT_X(s, Q_FUNC_INFO, "Invoke failed");
-            Q_UNUSED(s);
+            //! https://dev.swift-project.org/T490
+            QPointer<CDatabaseReader> myself(this);
+            QTimer::singleShot(0, this, [ = ]
+            {
+                if (!sApp || sApp->isShuttingDown() || !myself) { return; }
+                this->read(entities, mode, newerThan);
+            });
         }
 
         CDatabaseReader::JsonDatastoreResponse CDatabaseReader::transformReplyIntoDatastoreResponse(QNetworkReply *nwReply) const
diff --git a/src/blackcore/db/databasereader.h b/src/blackcore/db/databasereader.h
index a8cd11dce..0d4c3b3df 100644
--- a/src/blackcore/db/databasereader.h
+++ b/src/blackcore/db/databasereader.h
@@ -431,6 +431,10 @@ namespace BlackCore
 
             //! Network request progress
             virtual void networkReplyProgress(int logId, qint64 current, qint64 max, const QUrl &url) override;
+
+        private:
+            //! Read / re-read data file
+            virtual void read(BlackMisc::Network::CEntityFlags::Entity entities, BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan) = 0;
         };
     } // ns
 } // ns
diff --git a/src/blackcore/db/icaodatareader.cpp b/src/blackcore/db/icaodatareader.cpp
index a9c942872..9911a2383 100644
--- a/src/blackcore/db/icaodatareader.cpp
+++ b/src/blackcore/db/icaodatareader.cpp
@@ -160,7 +160,7 @@ namespace BlackCore
             return this->getCountries().size();
         }
 
-        void CIcaoDataReader::ps_read(CEntityFlags::Entity entities, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
+        void CIcaoDataReader::read(CEntityFlags::Entity entities, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
         {
             this->threadAssertCheck(); // runs in background thread
             if (!this->doWorkCheck()) { return; }
diff --git a/src/blackcore/db/icaodatareader.h b/src/blackcore/db/icaodatareader.h
index 43c7cee56..53513d54d 100644
--- a/src/blackcore/db/icaodatareader.h
+++ b/src/blackcore/db/icaodatareader.h
@@ -154,11 +154,6 @@ namespace BlackCore
             virtual bool hasChangedUrl(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Network::CUrl &oldUrlInfo, BlackMisc::Network::CUrl &newUrlInfo) const override;
             virtual BlackMisc::Network::CUrl getDbServiceBaseUrl() const override;
 
-        private slots:
-            //! Read / re-read data
-            void ps_read(BlackMisc::Network::CEntityFlags::Entity entities,
-                         BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan);
-
         private:
             BlackMisc::CData<BlackCore::Data::TDbAircraftIcaoCache> m_aircraftIcaoCache {this, &CIcaoDataReader::aircraftIcaoCacheChanged };
             BlackMisc::CData<BlackCore::Data::TDbAirlineIcaoCache>  m_airlineIcaoCache  {this, &CIcaoDataReader::airlineIcaoCacheChanged };
@@ -167,6 +162,10 @@ namespace BlackCore
             std::atomic_bool m_syncedAirlineIcaoCache  { false }; //!< already synchronized?
             std::atomic_bool m_syncedCountryCache      { false }; //!< already synchronized?
 
+            //! \copydoc CDatabaseReader::read
+            virtual void read(BlackMisc::Network::CEntityFlags::Entity entities,
+                              BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan) override;
+
             //! Reader URL (we read from where?) used to detect changes of location
             BlackMisc::CData<BlackCore::Data::TDbIcaoReaderBaseUrl> m_readerUrlCache {this, &CIcaoDataReader::baseUrlCacheChanged };
 
diff --git a/src/blackcore/db/infodatareader.cpp b/src/blackcore/db/infodatareader.cpp
index e989abc59..7571ad41c 100644
--- a/src/blackcore/db/infodatareader.cpp
+++ b/src/blackcore/db/infodatareader.cpp
@@ -137,7 +137,7 @@ namespace BlackCore
             return sApp->getGlobalSetup().getDbInfoReaderUrl();
         }
 
-        void CInfoDataReader::read()
+        void CInfoDataReader::readInfoData()
         {
             if (!this->doWorkCheck()) { return; }
 
@@ -206,17 +206,25 @@ namespace BlackCore
         CEntityFlags::EntityFlag CInfoDataReader::getEntityForMode() const
         {
             if (m_mode == CDbFlags::DbReading) return CEntityFlags::DbInfoObjectEntity;
-            if (m_mode == CDbFlags::Shared) return CEntityFlags::SharedInfoObjectEntity;
+            if (m_mode == CDbFlags::Shared)    return CEntityFlags::SharedInfoObjectEntity;
             qFatal("Wrong mode");
             return CEntityFlags::NoEntity;
         }
 
+        void CInfoDataReader::read(CEntityFlags::Entity entities, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
+        {
+            Q_UNUSED(entities);
+            Q_UNUSED(mode);
+            Q_UNUSED(newerThan);
+            Q_ASSERT_X(false, Q_FUNC_INFO, "Not implemented for CInfoDataReader");
+        }
+
         CUrl CInfoDataReader::getInfoObjectsUrl() const
         {
             switch (m_mode)
             {
             case CDbFlags::DbReading: return getDbInfoObjectsUrl();
-            case CDbFlags::Shared: return getSharedInfoObjectsUrl();
+            case CDbFlags::Shared:    return getSharedInfoObjectsUrl();
             default: qFatal("Wrong mode");
             }
             return CUrl();
diff --git a/src/blackcore/db/infodatareader.h b/src/blackcore/db/infodatareader.h
index 918bbe81d..404273700 100644
--- a/src/blackcore/db/infodatareader.h
+++ b/src/blackcore/db/infodatareader.h
@@ -48,7 +48,7 @@ namespace BlackCore
             bool areAllInfoObjectsRead() const;
 
             //! Allow to call directly, special for info objects reader
-            void read();
+            void readInfoData();
 
             //! URL depending on mode, i.e. shared/DB
             BlackMisc::Network::CUrl getInfoObjectsUrl() const;
@@ -86,6 +86,9 @@ namespace BlackCore
             //! \remark CEntityFlags::DbInfoObjectEntity or CEntityFlags::SharedInfoObjectEntity
             BlackMisc::Network::CEntityFlags::EntityFlag getEntityForMode() const;
 
+            //! \copydoc CDatabaseReader::read
+            virtual void read(BlackMisc::Network::CEntityFlags::Entity entities, BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan) override;
+
             BlackMisc::Db::CDbFlags::DataRetrievalModeFlag m_mode; //!< shared or DB web service?
             BlackMisc::Db::CDbInfoList m_infoObjects;
             BlackMisc::Network::CUrl   m_urlInfoObjects;
diff --git a/src/blackcore/db/modeldatareader.cpp b/src/blackcore/db/modeldatareader.cpp
index 694930bde..427cb5cf1 100644
--- a/src/blackcore/db/modeldatareader.cpp
+++ b/src/blackcore/db/modeldatareader.cpp
@@ -179,7 +179,7 @@ namespace BlackCore
                 this->getDistributorsCount() > 0;
         }
 
-        void CModelDataReader::ps_read(CEntityFlags::Entity entities, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
+        void CModelDataReader::read(CEntityFlags::Entity entities, CDbFlags::DataRetrievalModeFlag mode, const QDateTime &newerThan)
         {
             this->threadAssertCheck();
             if (!this->doWorkCheck()) { return; }
diff --git a/src/blackcore/db/modeldatareader.h b/src/blackcore/db/modeldatareader.h
index 11a26a3e9..d1a1cd67e 100644
--- a/src/blackcore/db/modeldatareader.h
+++ b/src/blackcore/db/modeldatareader.h
@@ -154,12 +154,6 @@ namespace BlackCore
             virtual bool hasChangedUrl(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Network::CUrl &oldUrlInfo, BlackMisc::Network::CUrl &newUrlInfo) const override;
             virtual BlackMisc::Network::CUrl getDbServiceBaseUrl() const override;
 
-        private slots:
-            //! Read / re-read data file
-            void ps_read(BlackMisc::Network::CEntityFlags::Entity entities = BlackMisc::Network::CEntityFlags::DistributorLiveryModel,
-                         BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode = BlackMisc::Db::CDbFlags::DbReading,
-                         const QDateTime &newerThan = QDateTime());
-
         private:
             BlackMisc::CData<BlackCore::Data::TDbLiveryCache>      m_liveryCache { this, &CModelDataReader::liveryCacheChanged };
             BlackMisc::CData<BlackCore::Data::TDbModelCache>       m_modelCache  { this, &CModelDataReader::modelCacheChanged };
@@ -168,6 +162,10 @@ namespace BlackCore
             std::atomic_bool m_syncedModelCache  { false }; //!< already synchronized?
             std::atomic_bool m_syncedDistributorCache { false }; //!< already synchronized?
 
+            //! \copydoc CDatabaseReader::read
+            virtual void read(BlackMisc::Network::CEntityFlags::Entity entities = BlackMisc::Network::CEntityFlags::DistributorLiveryModel,
+                              BlackMisc::Db::CDbFlags::DataRetrievalModeFlag mode = BlackMisc::Db::CDbFlags::DbReading, const QDateTime &newerThan = QDateTime()) override;
+
             //! Reader URL (we read from where?) used to detect changes of location
             BlackMisc::CData<BlackCore::Data::TDbModelReaderBaseUrl> m_readerUrlCache { this, &CModelDataReader::baseUrlCacheChanged };
 
diff --git a/src/blackcore/vatsim/vatsimstatusfilereader.cpp b/src/blackcore/vatsim/vatsimstatusfilereader.cpp
index 69c5d773e..f59e352ab 100644
--- a/src/blackcore/vatsim/vatsimstatusfilereader.cpp
+++ b/src/blackcore/vatsim/vatsimstatusfilereader.cpp
@@ -47,7 +47,7 @@ namespace BlackCore
 
         void CVatsimStatusFileReader::readInBackgroundThread()
         {
-            const bool s = QMetaObject::invokeMethod(this, &CVatsimStatusFileReader::ps_read);
+            const bool s = QMetaObject::invokeMethod(this, &CVatsimStatusFileReader::read);
             Q_ASSERT_X(s, Q_FUNC_INFO, "Invoke failed");
             Q_UNUSED(s);
         }
@@ -62,7 +62,7 @@ namespace BlackCore
             return m_lastGoodSetup.get().getDataFileUrls();
         }
 
-        void CVatsimStatusFileReader::ps_read()
+        void CVatsimStatusFileReader::read()
         {
             this->threadAssertCheck();
             if (!this->doWorkCheck()) { return; }
diff --git a/src/blackcore/vatsim/vatsimstatusfilereader.h b/src/blackcore/vatsim/vatsimstatusfilereader.h
index 14e912698..17fa4e53b 100644
--- a/src/blackcore/vatsim/vatsimstatusfilereader.h
+++ b/src/blackcore/vatsim/vatsimstatusfilereader.h
@@ -45,7 +45,6 @@ namespace BlackCore
             //! \threadsafe
             BlackMisc::Network::CUrlList getDataFileUrls() const;
 
-        public slots:
             //! Start reading in own thread
             void readInBackgroundThread();
 
@@ -56,11 +55,10 @@ namespace BlackCore
             //! Data have been read
             void dataRead(BlackMisc::Network::CEntityFlags::Entity entity, BlackMisc::Network::CEntityFlags::ReadState state, int number);
 
-        private slots:
-            //! Read / re-read data file
-            void ps_read();
-
         private:
+            //! Read / re-read data file
+            void read();
+
             //! Data have been read, parse VATSIM file
             void parseVatsimFile(QNetworkReply *nwReply);
 
diff --git a/src/blackcore/webdataservices.cpp b/src/blackcore/webdataservices.cpp
index 558ae2587..2079bd146 100644
--- a/src/blackcore/webdataservices.cpp
+++ b/src/blackcore/webdataservices.cpp
@@ -1168,7 +1168,7 @@ namespace BlackCore
             {
                 if (!myself || m_shuttingDown) { return; }
                 if (!sApp || sApp->isShuttingDown()) { return; }
-                m_dbInfoDataReader->read(); // trigger read of info objects
+                m_dbInfoDataReader->readInfoData(); // trigger read of info objects
             });
         }
     }
@@ -1209,7 +1209,7 @@ namespace BlackCore
         QTimer::singleShot(25, m_sharedInfoDataReader, [ = ]()
         {
             if (!myself || m_shuttingDown) { return; }
-            m_sharedInfoDataReader->read();
+            m_sharedInfoDataReader->readInfoData();
         });
     }