diff --git a/src/blackgui/views/aircraftmodelvalidationdialog.cpp b/src/blackgui/views/aircraftmodelvalidationdialog.cpp
index 681e69083..2683c69f0 100644
--- a/src/blackgui/views/aircraftmodelvalidationdialog.cpp
+++ b/src/blackgui/views/aircraftmodelvalidationdialog.cpp
@@ -43,12 +43,9 @@ namespace BlackGui
 
             CAircraftModelList valid;
             CAircraftModelList invalid;
-            const CCountPerSimulator counts = m_models.countPerSimulator();
-            const double fsFamilyCount = counts.getCountForFsFamilySimulators();
-            const double fsRatio = fsFamilyCount / m_models.size();
             const bool ignoreEmpty = false;
             const int maxFailedFiles = 25;
-            const CStatusMessageList msgs = fsRatio > 0.9 ?
+            const CStatusMessageList msgs = m_models.isLikelyFsFamilyModelList() ?
                                             CFsCommonUtil::validateConfigFiles(m_models, valid, invalid, ignoreEmpty, maxFailedFiles) :
                                             m_models.validateFiles(valid, invalid, ignoreEmpty, maxFailedFiles);
             ui->comp_StatusMessage->clear();
diff --git a/src/blackmisc/simulation/aircraftmodellist.cpp b/src/blackmisc/simulation/aircraftmodellist.cpp
index d556c01b0..6d1e2bfac 100644
--- a/src/blackmisc/simulation/aircraftmodellist.cpp
+++ b/src/blackmisc/simulation/aircraftmodellist.cpp
@@ -557,6 +557,34 @@ namespace BlackMisc
             return CSimulatorInfo(s);
         }
 
+        namespace Private
+        {
+            bool isLikelyImpl(double count, double total)
+            {
+                if (total < 1) { return false; }
+                const double fsRatio = count / total;
+                return fsRatio > 0.95;
+            }
+        }
+
+        bool CAircraftModelList::isLikelyFsFamilyModelList() const
+        {
+            if (this->isEmpty()) { return false; } // avoid DIV 0
+            return Private::isLikelyImpl(this->countPerSimulator().getCountForFsFamilySimulators(), this->size());
+        }
+
+        bool CAircraftModelList::isLikelyFsxFamilyModelList() const
+        {
+            if (this->isEmpty()) { return false; } // avoid DIV 0
+            return Private::isLikelyImpl(this->countPerSimulator().getCountForFsxFamilySimulators(), this->size());
+        }
+
+        bool CAircraftModelList::isLikelyXplaneModelList() const
+        {
+            if (this->isEmpty()) { return false; } // avoid DIV 0
+            return Private::isLikelyImpl(this->countPerSimulator().getCount(CSimulatorInfo::xplane()), this->size());
+        }
+
         int CAircraftModelList::setModelMode(CAircraftModel::ModelMode mode)
         {
             int c = 0;
diff --git a/src/blackmisc/simulation/aircraftmodellist.h b/src/blackmisc/simulation/aircraftmodellist.h
index de64d4904..ef27381f5 100644
--- a/src/blackmisc/simulation/aircraftmodellist.h
+++ b/src/blackmisc/simulation/aircraftmodellist.h
@@ -229,9 +229,18 @@ namespace BlackMisc
             //! Set simulator for all elements
             int setSimulatorInfo(const CSimulatorInfo &info);
 
-            //! Which simulators are supported in that model list
+            //! Which simulators are supported in this model list
             CSimulatorInfo simulatorsSupported() const;
 
+            //! Is this here a FS family (P3D/FSX/FS9) model list?
+            bool isLikelyFsFamilyModelList() const;
+
+            //! Is this here a FS family (P3D/FSX) model list?
+            bool isLikelyFsxFamilyModelList() const;
+
+            //! Is this here a XPlane model list?
+            bool isLikelyXplaneModelList() const;
+
             //! Set mode for all elements
             int setModelMode(CAircraftModel::ModelMode mode);