diff --git a/src/blackmisc/simulation/aircraftmodellist.cpp b/src/blackmisc/simulation/aircraftmodellist.cpp
index cda73a690..e62819157 100644
--- a/src/blackmisc/simulation/aircraftmodellist.cpp
+++ b/src/blackmisc/simulation/aircraftmodellist.cpp
@@ -280,6 +280,22 @@ namespace BlackMisc
             });
         }
 
+        bool CAircraftModelList::containsMatchingSimulator(const CSimulatorInfo &simulators) const
+        {
+            return this->containsBy([ & ](const CAircraftModel & model)
+            {
+                return model.matchesSimulator(simulators);
+            });
+        }
+
+        bool CAircraftModelList::containsNotMatchingSimulator(const CSimulatorInfo &simulators) const
+        {
+            return this->containsBy([ & ](const CAircraftModel & model)
+            {
+                return !model.matchesSimulator(simulators);
+            });
+        }
+
         CAircraftModelList CAircraftModelList::findByDistributors(const CDistributorList &distributors) const
         {
             if (distributors.isEmpty()) { return CAircraftModelList(); }
diff --git a/src/blackmisc/simulation/aircraftmodellist.h b/src/blackmisc/simulation/aircraftmodellist.h
index 7321953b5..d99093756 100644
--- a/src/blackmisc/simulation/aircraftmodellist.h
+++ b/src/blackmisc/simulation/aircraftmodellist.h
@@ -80,6 +80,12 @@ namespace BlackMisc
             //! Contains any model with aircraft and airline ICAO designator
             bool containsModelsWithAircraftAndAirlineIcaoDesignator(const QString &aircraftDesignator, const QString &airlineDesignator) const;
 
+            //! Contains any model matching any of of passed simulators
+            bool containsMatchingSimulator(const CSimulatorInfo &simulators) const;
+
+            //! Contains any model not matching any of of passed simulators
+            bool containsNotMatchingSimulator(const CSimulatorInfo &simulators) const;
+
             //! Find by model string
             //! \remark normally CAircraftModelList::findFirstByModelStringOrDefault would be used
             CAircraftModelList findByModelString(const QString &modelString, Qt::CaseSensitivity sensitivity = Qt::CaseInsensitive) const;
diff --git a/src/blackmisc/simulation/simulatorinfo.cpp b/src/blackmisc/simulation/simulatorinfo.cpp
index bb4b9918a..1c31d1a8c 100644
--- a/src/blackmisc/simulation/simulatorinfo.cpp
+++ b/src/blackmisc/simulation/simulatorinfo.cpp
@@ -169,6 +169,11 @@ namespace BlackMisc
             return set;
         }
 
+        void CSimulatorInfo::invertSimulators()
+        {
+            m_simulator = (m_simulator ^ static_cast<int>(All)) & static_cast<int>(All);
+        }
+
         const QString &CSimulatorInfo::toPluginIdentifier() const
         {
             static const QString e;
diff --git a/src/blackmisc/simulation/simulatorinfo.h b/src/blackmisc/simulation/simulatorinfo.h
index d2015f31c..ac5d804a0 100644
--- a/src/blackmisc/simulation/simulatorinfo.h
+++ b/src/blackmisc/simulation/simulatorinfo.h
@@ -153,6 +153,9 @@ namespace BlackMisc
             //! As a set of single simulator info objects
             QSet<CSimulatorInfo> asSingleSimulatorSet() const;
 
+            //! All simulators selected become unselected and vice versa
+            void invertSimulators();
+
             //! To plugin indentifier, empty string if not single simulator
             const QString &toPluginIdentifier() const;