diff --git a/src/MissionManager/MissionController.cc b/src/MissionManager/MissionController.cc
index 257a2a7231aabf77f8de5b5024e5f13b4be8e0f9..a11afb3317e70bf6a2a32d068025d06bba9b30f0 100644
--- a/src/MissionManager/MissionController.cc
+++ b/src/MissionManager/MissionController.cc
@@ -1110,9 +1110,14 @@ void MissionController::_recalcWaypointLines(void)
     qCDebug(MissionControllerLog) << "_recalcWaypointLines homePositionValid" << homePositionValid;
 
     CoordVectHashTable old_table = _linesTable;
+
     _linesTable.clear();
-    _waypointLines.clear();
     _waypointPath.clear();
+
+    _waypointLines.beginReset();
+    _directionArrows.beginReset();
+
+    _waypointLines.clear();
     _directionArrows.clear();
 
     bool linkEndToHome;
@@ -1150,7 +1155,10 @@ void MissionController::_recalcWaypointLines(void)
 
                 lastSegmentVisualItemPair =  VisualItemPair(lastCoordinateItem, item);
                 if (!_flyView || addDirectionArrow) {
-                    _directionArrows.append(_addWaypointLineSegment(old_table, lastSegmentVisualItemPair));
+                    CoordinateVector* coordVector = _addWaypointLineSegment(old_table, lastSegmentVisualItemPair);
+                    if (addDirectionArrow) {
+                        _directionArrows.append(coordVector);
+                    }
                 }
             }
             firstCoordinateItem = false;
@@ -1205,6 +1213,9 @@ void MissionController::_recalcWaypointLines(void)
         _waypointLines.swapObjectList(objs);
     }
 
+    _waypointLines.endReset();
+    _directionArrows.endReset();
+
     // Anything left in the old table is an obsolete line object that can go
     qDeleteAll(old_table);
 
@@ -1218,7 +1229,6 @@ void MissionController::_recalcWaypointLines(void)
         _waypointPath.append(QVariant::fromValue(QGeoCoordinate(0, 0)));
     }
 
-    emit waypointLinesChanged();
     emit waypointPathChanged();
 }
 
diff --git a/src/MissionManager/MissionController.h b/src/MissionManager/MissionController.h
index 16d2c549cfcff22eb98b6f6443b4e999d0695ad0..62b4235ec26b74c160022d7a93262207bc76ed8d 100644
--- a/src/MissionManager/MissionController.h
+++ b/src/MissionManager/MissionController.h
@@ -68,7 +68,7 @@ public:
     } MissionFlightStatus_t;
 
     Q_PROPERTY(QmlObjectListModel*  visualItems             READ visualItems                NOTIFY visualItemsChanged)
-    Q_PROPERTY(QmlObjectListModel*  waypointLines           READ waypointLines              NOTIFY waypointLinesChanged)        ///< Used by Plan view only for interactive editing
+    Q_PROPERTY(QmlObjectListModel*  waypointLines           READ waypointLines              CONSTANT)                           ///< Used by Plan view only for interactive editing
     Q_PROPERTY(QVariantList         waypointPath            READ waypointPath               NOTIFY waypointPathChanged)         ///< Used by Fly view only for static display
     Q_PROPERTY(QmlObjectListModel*  directionArrows         READ directionArrows            CONSTANT)
     Q_PROPERTY(QStringList          complexMissionItemNames READ complexMissionItemNames    NOTIFY complexMissionItemNamesChanged)
@@ -206,7 +206,6 @@ public:
 
 signals:
     void visualItemsChanged             (void);
-    void waypointLinesChanged           (void);
     void waypointPathChanged            (void);
     void newItemsFromVehicle            (void);
     void missionDistanceChanged         (double missionDistance);
diff --git a/src/MissionManager/MissionControllerTest.cc b/src/MissionManager/MissionControllerTest.cc
index 29d3f2c9c75ca5731933e1eb108ab9893991b797..effced1e7205cc95445fca08cdb2a483815ffc32 100644
--- a/src/MissionManager/MissionControllerTest.cc
+++ b/src/MissionManager/MissionControllerTest.cc
@@ -48,7 +48,6 @@ void MissionControllerTest::_initForFirmwareType(MAV_AUTOPILOT firmwareType)
 
     // MissionController signals
     _rgMissionControllerSignals[visualItemsChangedSignalIndex] =    SIGNAL(visualItemsChanged());
-    _rgMissionControllerSignals[waypointLinesChangedSignalIndex] =  SIGNAL(waypointLinesChanged());
 
     // Master controller pulls offline vehicle info from settings
     qgcApp()->toolbox()->settingsManager()->appSettings()->offlineEditingFirmwareType()->setRawValue(firmwareType);
@@ -62,7 +61,7 @@ void MissionControllerTest::_initForFirmwareType(MAV_AUTOPILOT firmwareType)
     _masterController->start(false /* flyView */);
 
     // All signals should some through on start
-    QCOMPARE(_multiSpyMissionController->checkOnlySignalsByMask(visualItemsChangedSignalMask | waypointLinesChangedSignalMask), true);
+    QCOMPARE(_multiSpyMissionController->checkOnlySignalsByMask(visualItemsChangedSignalMask), true);
     _multiSpyMissionController->clearAllSignals();
 
     QmlObjectListModel* visualItems = _missionController->visualItems();
@@ -120,8 +119,6 @@ void MissionControllerTest::_testAddWaypointWorker(MAV_AUTOPILOT firmwareType)
 
     _missionController->insertSimpleMissionItem(coordinate, _missionController->visualItems()->count());
 
-    QCOMPARE(_multiSpyMissionController->checkOnlySignalsByMask(waypointLinesChangedSignalMask), true);
-
     QmlObjectListModel* visualItems = _missionController->visualItems();
     QVERIFY(visualItems);
 
diff --git a/src/MissionManager/MissionControllerTest.h b/src/MissionManager/MissionControllerTest.h
index 101c20482dc9841926c97cd2a804bc96aa69323a..88a4ec6e034a87a334591d3c04ce3c641093d3be 100644
--- a/src/MissionManager/MissionControllerTest.h
+++ b/src/MissionManager/MissionControllerTest.h
@@ -70,13 +70,11 @@ private:
 
     enum {
         visualItemsChangedSignalIndex = 0,
-        waypointLinesChangedSignalIndex,
         missionControllerMaxSignalIndex
     };
 
     enum {
         visualItemsChangedSignalMask =                 1 << visualItemsChangedSignalIndex,
-        waypointLinesChangedSignalMask =                1 << waypointLinesChangedSignalIndex,
     };
 
     MultiSignalSpy*     _multiSpyMissionController;
diff --git a/src/QmlControls/QmlObjectListModel.cc b/src/QmlControls/QmlObjectListModel.cc
index e06e61db8c673df02c731751b8dd2f22f5a7edf2..1395fa862143f0162fb58da0f5dd87f9728ea64d 100644
--- a/src/QmlControls/QmlObjectListModel.cc
+++ b/src/QmlControls/QmlObjectListModel.cc
@@ -20,9 +20,10 @@ const int QmlObjectListModel::ObjectRole = Qt::UserRole;
 const int QmlObjectListModel::TextRole = Qt::UserRole + 1;
 
 QmlObjectListModel::QmlObjectListModel(QObject* parent)
-    : QAbstractListModel(parent)
-    , _dirty(false)
-    , _skipDirtyFirstItem(false)
+    : QAbstractListModel        (parent)
+    , _dirty                    (false)
+    , _skipDirtyFirstItem       (false)
+    , _externalBeginResetModel  (false)
 {
 
 }
@@ -142,8 +143,13 @@ const QObject* QmlObjectListModel::operator[](int index) const
 
 void QmlObjectListModel::clear()
 {
-    while (rowCount()) {
-        removeAt(0);
+    if (!_externalBeginResetModel) {
+        beginResetModel();
+    }
+    _objectList.clear();
+    if (!_externalBeginResetModel) {
+        endResetModel();
+        emit countChanged(count());
     }
 }
 
@@ -221,10 +227,14 @@ void QmlObjectListModel::append(QList<QObject*> objects)
 QObjectList QmlObjectListModel::swapObjectList(const QObjectList& newlist)
 {
     QObjectList oldlist(_objectList);
-    beginResetModel();
+    if (!_externalBeginResetModel) {
+        beginResetModel();
+    }
     _objectList = newlist;
-    endResetModel();
-    emit countChanged(count());
+    if (!_externalBeginResetModel) {
+        endResetModel();
+        emit countChanged(count());
+    }
     return oldlist;
 }
 
@@ -274,3 +284,21 @@ void QmlObjectListModel::clearAndDeleteContents()
     clear();
     endResetModel();
 }
+
+void QmlObjectListModel::beginReset(void)
+{
+    if (_externalBeginResetModel) {
+        qWarning() << "QmlObjectListModel::beginReset already set";
+    }
+    _externalBeginResetModel = true;
+    beginResetModel();
+}
+
+void QmlObjectListModel::endReset(void)
+{
+    if (!_externalBeginResetModel) {
+        qWarning() << "QmlObjectListModel::endReset begin not set";
+    }
+    _externalBeginResetModel = false;
+    endResetModel();
+}
diff --git a/src/QmlControls/QmlObjectListModel.h b/src/QmlControls/QmlObjectListModel.h
index dd04d6d01eb04bfffd4cf8b93f846243c0fc8354..49c2dd9d3acbc73493dd7d527c6bafe1007b4ee8 100644
--- a/src/QmlControls/QmlObjectListModel.h
+++ b/src/QmlControls/QmlObjectListModel.h
@@ -33,6 +33,7 @@ public:
     
     int         count               () const;
     bool        dirty               () const { return _dirty; }
+
     void        setDirty            (bool dirty);
     void        append              (QObject* object);
     void        append              (QList<QObject*> objects);
@@ -56,8 +57,8 @@ public:
     /// Clears the list and calls deleteLater on each entry
     void clearAndDeleteContents     ();
 
-    void beginReset                 () { beginResetModel(); }
-    void endReset                   () { endResetModel();   }
+    void beginReset                 ();
+    void endReset                   ();
 
 signals:
     void countChanged               (int count);
@@ -80,6 +81,7 @@ private:
     
     bool _dirty;
     bool _skipDirtyFirstItem;
+    bool _externalBeginResetModel;
         
     static const int ObjectRole;
     static const int TextRole;