diff --git a/playground/levelingsensor/SkinFactory.cpp b/playground/levelingsensor/SkinFactory.cpp
index dbf790aa..04fbf08b 100644
--- a/playground/levelingsensor/SkinFactory.cpp
+++ b/playground/levelingsensor/SkinFactory.cpp
@@ -43,106 +43,6 @@ namespace
             style< Skinnable >( editor );
         }
 
-        template<>
-        void style< QskSlider >( QskSkinHintTableEditor& editor )
-        {
-            using A = QskAspect;
-            using Q = QskSlider;
-
-            const qreal extent = 40;
-
-            // Panel
-
-            for ( auto variation : { A::Horizontal, A::Vertical } )
-            {
-                const auto aspect = Q::Panel | variation;
-
-                editor.setMetric( aspect | A::Size, extent );
-                editor.setBoxBorderMetrics( aspect, 0 );
-                editor.setBoxShape( aspect, 0 );
-                editor.setGradient( aspect, QskGradient() );
-            }
-
-            // Groove, Fill
-
-            for ( auto variation : { A::Horizontal, A::Vertical } )
-            {
-                for ( auto subControl : { Q::Groove, Q::Fill } )
-                {
-                    const auto aspect = subControl | variation;
-
-                    editor.setMetric( aspect | A::Size, 0.3 * extent );
-
-                    editor.setBoxBorderMetrics( aspect, 0 );
-                    editor.setBoxShape( aspect, 0.1 * extent );
-                }
-
-                editor.setGradient( Q::Groove | variation, Qt::lightGray );
-                editor.setGradient( Q::Fill | variation, Qt::darkGray );
-            }
-
-            // Handle
-
-            for ( auto variation : { A::Horizontal, A::Vertical } )
-            {
-                const auto aspect = Q::Handle | variation;
-                editor.setColor( aspect, Qt::black );
-
-                editor.setBoxShape( aspect, 20.0, Qt::RelativeSize );
-
-                const qreal sz = 0.75 * extent;
-                editor.setStrutSize( aspect, sz, sz );
-            }
-        }
-
-        template<>
-        void style< QskLevelingSensor >( QskSkinHintTableEditor& editor )
-        {
-            using Q = QskLevelingSensor;
-
-            static constexpr auto r1 = 0.9;
-            static constexpr auto r2 = 1.0;
-
-            QskGradient gradient{ {
-                { 0.5, Qt::lightGray },
-                { 0.5, Qt::lightGray },
-                { 0.5, Qt::darkGray },
-                { 1.0, Qt::darkGray },
-            } };
-            gradient.setLinearDirection( Qt::Vertical );
-
-            editor.setColor( Q::Background, "dimgray" );
-
-            editor.setStrutSize( Q::OuterDisk, { r2, r2 } );
-            editor.setColor( Q::OuterDisk, Qt::white );
-
-            editor.setGradient( Q::Horizon, gradient );
-            editor.setStrutSize( Q::Horizon, { r1, r1 } );
-
-            editor.setColor( Q::TickmarksX, Qt::black );
-            editor.setStrutSize( Q::TickmarksX, { r1, 0.2 } );             // w %, h %
-            editor.setHint( Q::TickmarksX, QVector3D{ 0.50, 0.75, 1.0 } ); // %
-            editor.setAlignment( Q::TickmarksX, Qt::AlignCenter );
-
-            editor.setStrutSize( Q::TickmarksXLabels, { r1, 0.15 } ); // w %, h %
-            editor.setAlignment( Q::TickmarksXLabels, Qt::AlignTop | Qt::AlignHCenter );
-
-            editor.setColor( Q::TickmarksY, Qt::black );
-            editor.setStrutSize( Q::TickmarksY, { 0.1, r1 } );              // w %, h %
-            editor.setHint( Q::TickmarksY, QVector3D{ 0.50, 0.75, 1.00 } ); // %
-            editor.setAlignment( Q::TickmarksY, Qt::AlignCenter );
-
-            editor.setStrutSize( Q::TickmarksYLabels, { 0.15, r1 } ); // w %, h %
-            editor.setAlignment( Q::TickmarksYLabels, Qt::AlignCenter );
-
-            editor.setColor( Q::TickmarksZ, "silver" );
-            editor.setStrutSize( Q::TickmarksZ, { 0.90, 0.95 } );
-            editor.setHint( Q::TickmarksZ, QVector3D{ 0.50, 0.75, 1.00 } ); // %
-
-            editor.setStrutSize( Q::TickmarksZLabels, { 0.9, 0.0 } ); // r1 %, r2 %
-            editor.setAlignment( Q::TickmarksZLabels, Qt::AlignCenter );
-        }
-
       public:
         Skin()
         {
@@ -152,6 +52,106 @@ namespace
             declareSkinlet< QskLevelingSensor, QskLevelingSensorSkinlet >( editor );
         }
     };
+
+    template<>
+    void Skin::style< QskSlider >( QskSkinHintTableEditor& editor )
+    {
+        using A = QskAspect;
+        using Q = QskSlider;
+
+        const qreal extent = 40;
+
+        // Panel
+
+        for ( auto variation : { A::Horizontal, A::Vertical } )
+        {
+            const auto aspect = Q::Panel | variation;
+
+            editor.setMetric( aspect | A::Size, extent );
+            editor.setBoxBorderMetrics( aspect, 0 );
+            editor.setBoxShape( aspect, 0 );
+            editor.setGradient( aspect, QskGradient() );
+        }
+
+        // Groove, Fill
+
+        for ( auto variation : { A::Horizontal, A::Vertical } )
+        {
+            for ( auto subControl : { Q::Groove, Q::Fill } )
+            {
+                const auto aspect = subControl | variation;
+
+                editor.setMetric( aspect | A::Size, 0.3 * extent );
+
+                editor.setBoxBorderMetrics( aspect, 0 );
+                editor.setBoxShape( aspect, 0.1 * extent );
+            }
+
+            editor.setGradient( Q::Groove | variation, Qt::lightGray );
+            editor.setGradient( Q::Fill | variation, Qt::darkGray );
+        }
+
+        // Handle
+
+        for ( auto variation : { A::Horizontal, A::Vertical } )
+        {
+            const auto aspect = Q::Handle | variation;
+            editor.setColor( aspect, Qt::black );
+
+            editor.setBoxShape( aspect, 20.0, Qt::RelativeSize );
+
+            const qreal sz = 0.75 * extent;
+            editor.setStrutSize( aspect, sz, sz );
+        }
+    }
+
+    template<>
+    void Skin::style< QskLevelingSensor >( QskSkinHintTableEditor& editor )
+    {
+        using Q = QskLevelingSensor;
+
+        static constexpr auto r1 = 0.9;
+        static constexpr auto r2 = 1.0;
+
+        QskGradient gradient{ {
+            { 0.5, Qt::lightGray },
+            { 0.5, Qt::lightGray },
+            { 0.5, Qt::darkGray },
+            { 1.0, Qt::darkGray },
+        } };
+        gradient.setLinearDirection( Qt::Vertical );
+
+        editor.setColor( Q::Background, "dimgray" );
+
+        editor.setStrutSize( Q::OuterDisk, { r2, r2 } );
+        editor.setColor( Q::OuterDisk, Qt::white );
+
+        editor.setGradient( Q::Horizon, gradient );
+        editor.setStrutSize( Q::Horizon, { r1, r1 } );
+
+        editor.setColor( Q::TickmarksX, Qt::black );
+        editor.setStrutSize( Q::TickmarksX, { r1, 0.2 } );             // w %, h %
+        editor.setHint( Q::TickmarksX, QVector3D{ 0.50, 0.75, 1.0 } ); // %
+        editor.setAlignment( Q::TickmarksX, Qt::AlignCenter );
+
+        editor.setStrutSize( Q::TickmarksXLabels, { r1, 0.15 } ); // w %, h %
+        editor.setAlignment( Q::TickmarksXLabels, Qt::AlignTop | Qt::AlignHCenter );
+
+        editor.setColor( Q::TickmarksY, Qt::black );
+        editor.setStrutSize( Q::TickmarksY, { 0.1, r1 } );              // w %, h %
+        editor.setHint( Q::TickmarksY, QVector3D{ 0.50, 0.75, 1.00 } ); // %
+        editor.setAlignment( Q::TickmarksY, Qt::AlignCenter );
+
+        editor.setStrutSize( Q::TickmarksYLabels, { 0.15, r1 } ); // w %, h %
+        editor.setAlignment( Q::TickmarksYLabels, Qt::AlignCenter );
+
+        editor.setColor( Q::TickmarksZ, "silver" );
+        editor.setStrutSize( Q::TickmarksZ, { 0.90, 0.95 } );
+        editor.setHint( Q::TickmarksZ, QVector3D{ 0.50, 0.75, 1.00 } ); // %
+
+        editor.setStrutSize( Q::TickmarksZLabels, { 0.9, 0.0 } ); // r1 %, r2 %
+        editor.setAlignment( Q::TickmarksZLabels, Qt::AlignCenter );
+    }
 }
 
 QStringList SkinFactory::skinNames() const
diff --git a/playground/levelingsensor/main.cpp b/playground/levelingsensor/main.cpp
index 2d1f4a6f..0182edf1 100644
--- a/playground/levelingsensor/main.cpp
+++ b/playground/levelingsensor/main.cpp
@@ -147,7 +147,7 @@ namespace
             auto linearIntervalA = []( const qreal degree ) -> QskIntervalF {
                 return { -degree, +degree };
             };
-            auto linearIntervalB = []( const qreal degree ) -> QskIntervalF { return {}; };
+            auto linearIntervalB = []( const qreal /*degree*/ ) -> QskIntervalF { return {}; };
 
             auto radialIntervalA = []( const qreal degree ) -> QskIntervalF {
                 return { -degree, +degree };