diff --git a/ground/openpilotgcs/src/plugins/config/airframe_custom.ui b/ground/openpilotgcs/src/plugins/config/airframe_custom.ui
index 189356db1..b9fe945fd 100644
--- a/ground/openpilotgcs/src/plugins/config/airframe_custom.ui
+++ b/ground/openpilotgcs/src/plugins/config/airframe_custom.ui
@@ -138,6 +138,12 @@
        <property name="columnCount">
         <number>12</number>
        </property>
+       <property name="editTriggers">
+        <set>QAbstractItemView::NoEditTriggers</set>
+       </property>
+       <property name="selectionMode">
+        <enum>QAbstractItemView::NoSelection</enum>
+       </property>
        <attribute name="horizontalHeaderDefaultSectionSize">
         <number>50</number>
        </attribute>
diff --git a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configcustomwidget.cpp b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configcustomwidget.cpp
index 9821ed2c9..93a9e9da6 100644
--- a/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configcustomwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/config/cfg_vehicletypes/configcustomwidget.cpp
@@ -130,6 +130,7 @@ ConfigCustomWidget::ConfigCustomWidget(QWidget *parent) :
     VehicleConfig(parent), m_aircraft(new Ui_CustomConfigWidget())
 {
     m_aircraft->setupUi(this);
+    m_aircraft->customMixerTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
 
     // Put combo boxes in line one of the custom mixer table:
     UAVDataObject *mixer  = dynamic_cast<UAVDataObject *>(getObjectManager()->getObject(QString("MixerSettings")));
@@ -206,6 +207,18 @@ void ConfigCustomWidget::refreshWidgetsValues(QString frameType)
 
     setupUI(frameType);
 
+    UAVDataObject *system = dynamic_cast<UAVDataObject *>(getObjectManager()->getObject(QString("SystemSettings")));
+    Q_ASSERT(system);
+    QPointer<UAVObjectField> field = system->getField(QString("AirframeType"));
+
+    // Do not allow table edit until AirframeType == Custom
+    // First save set AirframeType to 'Custom' and next modify.
+    if (field->getValue().toString() != "Custom") {
+        m_aircraft->customMixerTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
+    } else {
+        m_aircraft->customMixerTable->setEditTriggers(QAbstractItemView::AllEditTriggers);
+    }
+
     UAVDataObject *mixer = dynamic_cast<UAVDataObject *>(getObjectManager()->getObject(QString("MixerSettings")));
     Q_ASSERT(mixer);