diff --git a/src/blackmisc/simulation/data/modelcaches.h b/src/blackmisc/simulation/data/modelcaches.h
index 856d4fba4..e645129d1 100644
--- a/src/blackmisc/simulation/data/modelcaches.h
+++ b/src/blackmisc/simulation/data/modelcaches.h
@@ -220,10 +220,18 @@ namespace BlackMisc
                 //! \threadsafe
                 virtual void synchronizeCache(const CSimulatorInfo &simulator) = 0;
 
+                //! Synchronize multiple simulators
+                //! \threadsafe
+                virtual void synchronizeMultiCaches(const CSimulatorInfo &simulator);
+
                 //! Admit the cache for given simulator
                 //! \threadsafe
                 virtual void admitCache(const CSimulatorInfo &simulator) = 0;
 
+                //! Synchronize multiple simulators
+                //! \threadsafe
+                virtual void admitMultiCaches(const CSimulatorInfo &simulator);
+
                 //! Info string about models in cache
                 QString getInfoString() const;
 
diff --git a/src/blackmisc/simulation/fscommon/aircraftcfgparser.cpp b/src/blackmisc/simulation/fscommon/aircraftcfgparser.cpp
index 4a3c8fbeb..f1dbb00ac 100644
--- a/src/blackmisc/simulation/fscommon/aircraftcfgparser.cpp
+++ b/src/blackmisc/simulation/fscommon/aircraftcfgparser.cpp
@@ -72,6 +72,7 @@ namespace BlackMisc
                 if (mode.testFlag(LoadInBackground))
                 {
                     if (m_parserWorker && !m_parserWorker->isFinished()) { return; }
+                    emit this->diskLoadingStarted(simulator, mode);
                     m_parserWorker = BlackMisc::CWorker::fromTask(this, "CAircraftCfgParser::changeDirectory",
                                      [this, modelDirs, excludedDirectoryPatterns, simulator, modelConsolidation]()
                     {
@@ -110,6 +111,8 @@ namespace BlackMisc
                 }
                 else if (mode == LoadDirectly)
                 {
+                    emit this->diskLoadingStarted(simulator, mode);
+
                     bool ok;
                     CStatusMessageList msgs;
                     m_parsedCfgEntriesList = performParsing(modelDirs, excludedDirectoryPatterns, msgs, &ok);
diff --git a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
index 02769c1b7..16e2e887c 100644
--- a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
+++ b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
@@ -139,6 +139,7 @@ namespace BlackMisc
                 if (mode.testFlag(LoadInBackground))
                 {
                     if (m_parserWorker && !m_parserWorker->isFinished()) { return; }
+                    emit this->diskLoadingStarted(simulator, mode);
                     m_parserWorker = BlackMisc::CWorker::fromTask(this, "CAircraftModelLoaderXPlane::performParsing",
                                      [this, modelDirs, excludedDirectoryPatterns, modelConsolidation]()
                     {
@@ -157,8 +158,9 @@ namespace BlackMisc
                 }
                 else if (mode.testFlag(LoadDirectly))
                 {
-                    CAircraftModelList models(performParsing(this->getFirstModelDirectoryOrDefault(), excludedDirectoryPatterns));
-                    updateInstalledModels(models);
+                    emit this->diskLoadingStarted(simulator, mode);
+                    CAircraftModelList models(this->performParsing(this->getFirstModelDirectoryOrDefault(), excludedDirectoryPatterns));
+                    this->updateInstalledModels(models);
                 }
             }