diff --git a/src/Vehicle/Actuators/Actuators.cc b/src/Vehicle/Actuators/Actuators.cc
index 292781f..b477e56 100644
--- a/src/Vehicle/Actuators/Actuators.cc
+++ b/src/Vehicle/Actuators/Actuators.cc
@@ -239,7 +239,7 @@ void Actuators::parametersChanged()
     _actuatorTest.updateFunctions(actuators);
 
     // check if there are required functions, but not set on any output
-    QSet<int> requiredFunctions = _mixer.requiredFunctions();
+    QSet<int> requiredFunctions = _mixer.getFunctions(true);
     _hasUnsetRequiredFunctions = false;
     for (int requiredFunction : requiredFunctions) {
         if (uniqueConfiguredFunctions.find(requiredFunction) == uniqueConfiguredFunctions.end()) {
@@ -248,11 +248,92 @@ void Actuators::parametersChanged()
     }
     emit hasUnsetRequiredFunctionsChanged();
 
+    updateFunctionMetadata();
+
     updateActuatorActions();
 
     updateGeometryImage();
 }
 
+void Actuators::updateFunctionMetadata()
+{
+    // Update the function parameter metadata:
+    // - remove the mixer functions that are unused with the current configration (e.g. if 4 motors -> remove motors 5-N)
+    // - use the specific labels
+    QSet<int> usedMixerFunctions = _mixer.getFunctions(false);
+
+    QMap<int, QString> usedMixerLabels;
+    for (int usedMixerFunction : usedMixerFunctions) {
+        usedMixerLabels[usedMixerFunction] = _mixer.getSpecificLabelForFunction(usedMixerFunction);
+    }
+
+    if (_usedMixerLabels == usedMixerLabels) {
+        // no update required
+        return;
+    }
+    _usedMixerLabels = usedMixerLabels;
+
+    // Get the unused mixer functions
+    QSet<int> removedMixerFunctions;
+    for(Mixer::ActuatorTypes::const_iterator iter = _mixer.actuatorTypes().constBegin();
+            iter != _mixer.actuatorTypes().constEnd(); ++iter) {
+        if (iter.key() == "DEFAULT")
+            continue;
+
+        for (int i = iter.value().functionMin; i <= iter.value().functionMax; ++i) {
+            if (!usedMixerFunctions.contains(i)) {
+                removedMixerFunctions.insert(i);
+            }
+        }
+    }
+
+    // Now update all function facts (we need to treat them individually, as some might have extra functions)
+    for (int groupIdx = 0; groupIdx < _actuatorOutputs->count(); groupIdx++) {
+        ActuatorOutput* group = qobject_cast<ActuatorOutput*>(_actuatorOutputs->get(groupIdx));
+
+        group->forEachOutputFunction([&](ActuatorOutputSubgroup* subgroup, ChannelConfigInstance*, Fact* fact) {
+            QStringList enumStrings = fact->enumStrings();
+            if (!enumStrings.empty()) {
+                QVariantList enumValues = fact->enumValues();
+
+                // Replace or add
+                for (int usedMixerFunction : usedMixerFunctions) {
+                    QString label = usedMixerLabels[usedMixerFunction];
+                    int index = enumValues.indexOf(usedMixerFunction);
+                    if (index == -1) {
+                        // Insert at the right place
+                        bool inserted = false;
+                        for (index = 0; index < enumValues.count() && !inserted; ++index) {
+                            if (enumValues[index].toInt() > usedMixerFunction) {
+                                enumValues.insert(index, usedMixerFunction);
+                                enumStrings.insert(index, label);
+                                inserted = true;
+                            }
+                        }
+                        if (!inserted) {
+                            enumValues.append(usedMixerFunction);
+                            enumStrings.append(label);
+                        }
+                    } else {
+                        enumStrings[index] = label;
+                    }
+                }
+
+                // Remove
+                for (int removedMixerFunction : removedMixerFunctions) {
+                    int index = enumValues.indexOf(removedMixerFunction);
+                    if (index != -1) {
+                        enumValues.removeAt(index);
+                        enumStrings.removeAt(index);
+                    }
+                }
+
+                fact->setEnumInfo(enumStrings, enumValues);
+            }
+        });
+    }
+}
+
 void Actuators::updateActuatorActions()
 {
     _actuatorActions->clearAndDeleteContents();
diff --git a/src/Vehicle/Actuators/Actuators.h b/src/Vehicle/Actuators/Actuators.h
index 350e50f..4e1e54b 100644
--- a/src/Vehicle/Actuators/Actuators.h
+++ b/src/Vehicle/Actuators/Actuators.h
@@ -106,6 +106,8 @@ private:
 
     void highlightActuators(bool highlight);
 
+    void updateFunctionMetadata();
+
     QSet<Fact*> _subscribedFacts{};
     QJsonDocument _jsonMetadata;
     bool _init{false};
@@ -120,5 +122,6 @@ private:
     bool _imageRefreshFlag{false}; ///< indicator to QML to reload the image
     int _selectedActuatorOutput{0};
     Vehicle* _vehicle{nullptr};
+    QMap<int, QString> _usedMixerLabels;
 };
 
diff --git a/src/Vehicle/Actuators/Mixer.cc b/src/Vehicle/Actuators/Mixer.cc
index 952fcc9..5092626 100644
--- a/src/Vehicle/Actuators/Mixer.cc
+++ b/src/Vehicle/Actuators/Mixer.cc
@@ -317,7 +317,7 @@ void Mixers::update()
                     }
                     if (itemLabelPrefix != "") {
                         label = itemLabelPrefix + " (" + label + ")";
-                        _functionsSpecificLabel[actuatorFunction] = label;
+                        _functionsSpecificLabel[actuatorFunction] = itemLabelPrefix;
                     }
                 }
                 auto factAdded = [this](Function function, Fact* fact) {
@@ -348,20 +348,37 @@ void Mixers::update()
 QString Mixers::getSpecificLabelForFunction(int function) const
 {
     // Try to get it from the actuator type param
-    for (int mixerGroupIdx = 0; mixerGroupIdx < _groups->count(); ++mixerGroupIdx) {
+    Fact* typeFact = nullptr;
+    for (int mixerGroupIdx = 0; !typeFact && mixerGroupIdx < _groups->count(); ++mixerGroupIdx) {
         Mixer::MixerConfigGroup* mixerGroup = _groups->value<Mixer::MixerConfigGroup*>(mixerGroupIdx);
-        for (int mixerChannelIdx = 0; mixerChannelIdx < mixerGroup->channels()->count(); ++mixerChannelIdx) {
+        for (int mixerChannelIdx = 0; !typeFact && mixerChannelIdx < mixerGroup->channels()->count(); ++mixerChannelIdx) {
             Mixer::MixerChannel* mixerChannel = mixerGroup->channels()->value<Mixer::MixerChannel*>(mixerChannelIdx);
 
             if (mixerChannel->actuatorFunction() != function) {
                 continue;
             }
 
-            Fact* typeFact = mixerChannel->getFact(Function::Type);
-            if (typeFact) {
-                return typeFact->enumOrValueString() + " (" + _functions.value(function).label +")";
+            typeFact = mixerChannel->getFact(Function::Type);
+        }
+    }
+    if (typeFact) {
+        // Now check if we have multiple functions configured with the same type.
+        // If so, add the function label to disambiguate
+        for (int mixerGroupIdx = 0; mixerGroupIdx < _groups->count(); ++mixerGroupIdx) {
+            Mixer::MixerConfigGroup* mixerGroup = _groups->value<Mixer::MixerConfigGroup*>(mixerGroupIdx);
+            for (int mixerChannelIdx = 0; mixerChannelIdx < mixerGroup->channels()->count(); ++mixerChannelIdx) {
+                Mixer::MixerChannel* mixerChannel = mixerGroup->channels()->value<Mixer::MixerChannel*>(mixerChannelIdx);
+
+                if (mixerChannel->actuatorFunction() == function) {
+                    continue;
+                }
+                Fact* typeFactOther = mixerChannel->getFact(Function::Type);
+                if (typeFactOther && typeFactOther->rawValue() == typeFact->rawValue()) {
+                    return typeFact->enumOrValueString() + " (" + _functions.value(function).label +")";
+                }
             }
         }
+        return typeFact->enumOrValueString();
     }
 
     const auto iter = _functionsSpecificLabel.find(function);
@@ -371,12 +388,12 @@ QString Mixers::getSpecificLabelForFunction(int function) const
     return *iter;
 }
 
-QSet<int> Mixers::requiredFunctions() const
+QSet<int> Mixers::getFunctions(bool requiredOnly) const
 {
     QSet<int> ret;
     for (int mixerGroupIdx = 0; mixerGroupIdx < _groups->count(); ++mixerGroupIdx) {
         Mixer::MixerConfigGroup* mixerGroup = _groups->value<Mixer::MixerConfigGroup*>(mixerGroupIdx);
-        if (mixerGroup->group().required) {
+        if (!requiredOnly || mixerGroup->group().required) {
             for (int mixerChannelIdx = 0; mixerChannelIdx < mixerGroup->channels()->count(); ++mixerChannelIdx) {
                 const Mixer::MixerChannel* mixerChannel = mixerGroup->channels()->value<Mixer::MixerChannel*>(mixerChannelIdx);
                 if (mixerChannel->actuatorFunction() != 0) {
diff --git a/src/Vehicle/Actuators/Mixer.h b/src/Vehicle/Actuators/Mixer.h
index 08bb6e6..210826f 100644
--- a/src/Vehicle/Actuators/Mixer.h
+++ b/src/Vehicle/Actuators/Mixer.h
@@ -321,9 +321,9 @@ public:
     QString getSpecificLabelForFunction(int function) const;
 
     /**
-     * Get the set of all required actuator functions
+     * Get the set of all (required) actuator functions
      */
-    QSet<int> requiredFunctions() const;
+    QSet<int> getFunctions(bool requiredOnly) const;
 
     QString configuredType() const;