diff --git a/src/blackmisc/aviation/aircrafticaocode.cpp b/src/blackmisc/aviation/aircrafticaocode.cpp
index 0a598e557..96f0c281c 100644
--- a/src/blackmisc/aviation/aircrafticaocode.cpp
+++ b/src/blackmisc/aviation/aircrafticaocode.cpp
@@ -80,7 +80,9 @@ namespace BlackMisc
         QString CAircraftIcaoCode::convertToQString(bool i18n) const
         {
             Q_UNUSED(i18n);
-            return QStringLiteral("%1 %2 %3").arg(this->getDesignatorDbKey(), this->getCombinedType(), this->getWtc()).trimmed();
+            return (this->hasCategory()) ?
+                   QStringLiteral("%1 %2 %3 cat: %4").arg(this->getDesignatorDbKey(), this->getCombinedType(), this->getWtc(), this->getCategory().getDbKeyAsString()).trimmed() :
+                   QStringLiteral("%1 %2 %3").arg(this->getDesignatorDbKey(), this->getCombinedType(), this->getWtc()).trimmed();
         }
 
         void CAircraftIcaoCode::updateMissingParts(const CAircraftIcaoCode &otherIcaoCode)
diff --git a/src/blackmisc/aviation/aircraftsituation.cpp b/src/blackmisc/aviation/aircraftsituation.cpp
index 0447f2016..199e18efd 100644
--- a/src/blackmisc/aviation/aircraftsituation.cpp
+++ b/src/blackmisc/aviation/aircraftsituation.cpp
@@ -71,7 +71,7 @@ namespace BlackMisc
                    u' ' % this->getCorrectedAltitude().valueRoundedWithUnit(CLengthUnit::ft(), 1) %
                    u"[cor] | og: " % this->getOnGroundInfo() %
                    (m_onGroundGuessingDetails.isEmpty() ? QString() : u' ' % m_onGroundGuessingDetails) %
-                   u" | cg: " %
+                   u" | CG: " %
                    (m_cg.isNull() ? QStringLiteral("null") : m_cg.valueRoundedWithUnit(CLengthUnit::m(), 1) % u' ' % m_cg.valueRoundedWithUnit(CLengthUnit::ft(), 1)) %
                    u" | offset: " %
                    (m_sceneryOffset.isNull() ? QStringLiteral("null") : m_sceneryOffset.valueRoundedWithUnit(CLengthUnit::m(), 1) % u' ' % m_sceneryOffset.valueRoundedWithUnit(CLengthUnit::ft(), 1)) %
@@ -80,7 +80,7 @@ namespace BlackMisc
                    u" | bank: " % m_bank.toQString(i18n) %
                    u" | pitch: " % m_pitch.toQString(i18n) %
                    u" | heading: " % m_heading.toQString(i18n) %
-                   u" | gs: " % m_groundSpeed.valueRoundedWithUnit(CSpeedUnit::kts(), 1, true) %
+                   u" | GS: " % m_groundSpeed.valueRoundedWithUnit(CSpeedUnit::kts(), 1, true) %
                    u' ' % m_groundSpeed.valueRoundedWithUnit(CSpeedUnit::m_s(), 1, true) %
                    u" | elevation [" % this->getGroundElevationInfoAsString() % u"]: " % (m_groundElevationPlane.toQString(i18n));
         }
diff --git a/src/blackmisc/pq/physicalquantity.cpp b/src/blackmisc/pq/physicalquantity.cpp
index 4b08e8aa6..29eeefd72 100644
--- a/src/blackmisc/pq/physicalquantity.cpp
+++ b/src/blackmisc/pq/physicalquantity.cpp
@@ -333,7 +333,7 @@ namespace BlackMisc
         template <class MU, class PQ>
         QString CPhysicalQuantity<MU, PQ>::valueRoundedWithUnit(int digits, bool withGroupSeparator, bool i18n) const
         {
-            if (this->isNull()) { return this->convertToQString(i18n); }
+            if (this->isNull()) { return QStringLiteral("null"); }
             return this->valueRoundedWithUnit(m_unit, digits, withGroupSeparator, i18n);
         }
 
diff --git a/src/blackmisc/simulation/aircraftmodel.cpp b/src/blackmisc/simulation/aircraftmodel.cpp
index d4dd6de19..b65831148 100644
--- a/src/blackmisc/simulation/aircraftmodel.cpp
+++ b/src/blackmisc/simulation/aircraftmodel.cpp
@@ -65,7 +65,7 @@ namespace BlackMisc
         QString CAircraftModel::convertToQString(bool i18n) const
         {
             const QString s =
-                (this->hasAnyModelString() ? inApostrophes(this->getAllModelStringsAndAliases(), true) % QStringLiteral(" ") : QString()) %
+                (this->hasAnyModelString() ? inApostrophes(this->getAllModelStringsAliasesAndDbKey(), true) % QStringLiteral(" ") : QString()) %
                 u" type: '" % this->getModelTypeAsString() %
                 u"' ICAO: '" % this->getAircraftIcaoCode().toQString(i18n) %
                 u" CG: " % this->getCG().valueRoundedWithUnit(1) %
@@ -218,6 +218,13 @@ namespace BlackMisc
             return m_modelString % u", " % m_modelStringAlias;
         }
 
+        QString CAircraftModel::getAllModelStringsAliasesAndDbKey() const
+        {
+            if (!this->hasModelStringAlias() || m_modelString.isEmpty()) { return this->getModelStringAndDbKey(); }
+            if (!this->isLoadedFromDb()) { return this->getAllModelStringsAndAliases(); }
+            return this->getAllModelStringsAndAliases() % " " % this->getDbKeyAsStringInParentheses();
+        }
+
         bool CAircraftModel::isVtol() const
         {
             return this->getAircraftIcaoCode().isVtol();
@@ -926,8 +933,10 @@ namespace BlackMisc
             const QString modelName(json.value(prefix % u"name").toString());
             const QString modelMode(json.value(prefix % u"mode").toString());
             const QString parts(json.value(prefix % u"parts").toString());
+
+            // check for undefined to rule out 0ft values
             const QJsonValue cgjv = json.value(prefix % u"cgft");
-            const CLength cg = cgjv.isNull() ? CLength::null() : CLength(cgjv.toDouble(), CLengthUnit::ft());
+            const CLength cg = (cgjv.isNull() || cgjv.isUndefined()) ? CLength::null() : CLength(cgjv.toDouble(), CLengthUnit::ft());
 
             const CSimulatorInfo simInfo = CSimulatorInfo::fromDatabaseJson(json, prefix);
             CAircraftModel model(modelString, CAircraftModel::TypeDatabaseEntry, simInfo, modelName, modelDescription);
diff --git a/src/blackmisc/simulation/aircraftmodel.h b/src/blackmisc/simulation/aircraftmodel.h
index 32921a42e..9b7b2be60 100644
--- a/src/blackmisc/simulation/aircraftmodel.h
+++ b/src/blackmisc/simulation/aircraftmodel.h
@@ -188,6 +188,9 @@ namespace BlackMisc
             //! Get model string and aliases
             QString getAllModelStringsAndAliases() const;
 
+            //! Get model string and aliases
+            QString getAllModelStringsAliasesAndDbKey() const;
+
             //! Model string alias
             void setModelStringAlias(const QString &alias) { m_modelStringAlias = alias.trimmed().toUpper(); }