diff --git a/src/pygui/ISC/Tabs/WaferMapTab.qml b/src/pygui/ISC/Tabs/WaferMapTab.qml
index 206c4d7..0edc5de 100644
--- a/src/pygui/ISC/Tabs/WaferMapTab.qml
+++ b/src/pygui/ISC/Tabs/WaferMapTab.qml
@@ -26,8 +26,8 @@ Item {
 
     ColumnLayout {
         anchors.fill: parent
-        anchors.margins: Theme.panelPadding
-        spacing: Theme.rightPaneGap
+        anchors.margins: 16
+        spacing: 16
 
         // ── Toolbar ───────────────────────────────────────────────────────
         RowLayout {
@@ -176,7 +176,7 @@ Item {
         RowLayout {
             Layout.fillWidth: true
             Layout.fillHeight: true
-            spacing: Theme.rightPaneGap
+            spacing: 16
 
             // Source panel — bordered card
             Rectangle {
@@ -207,6 +207,18 @@ Item {
                     showLabels: readoutPanel.showLabels
                 }
 
+                // Horizontal separation line with vertical padding
+                Item {
+                    Layout.fillWidth: true
+                    implicitHeight: 32
+                    Rectangle {
+                        anchors.centerIn: parent
+                        width: parent.width
+                        height: 1
+                        color: Theme.cardBorder
+                    }
+                }
+
                 TransportBar { Layout.fillWidth: true }
             }
 
diff --git a/src/pygui/ISC/Tabs/components/ReadoutPanel.qml b/src/pygui/ISC/Tabs/components/ReadoutPanel.qml
index a8187ba..e302d9d 100644
--- a/src/pygui/ISC/Tabs/components/ReadoutPanel.qml
+++ b/src/pygui/ISC/Tabs/components/ReadoutPanel.qml
@@ -16,118 +16,120 @@ ColumnLayout {
         font.pixelSize: 10
         font.letterSpacing: 1.8
         font.weight: Font.Medium
-        bottomPadding: 4
+        topPadding: 6
+        bottomPadding: 8
     }
 
-    GridLayout {
-        columns: 2
-        rowSpacing: 4
-        columnSpacing: 4
+    Rectangle {
         Layout.fillWidth: true
+        implicitHeight: statsLayout.implicitHeight + 20
+        color: Theme.subtleSectionBackground
+        radius: Theme.radiusSm
+        border.color: Theme.cardBorder
+        border.width: 1
 
-        // MIN TEMP
-        Rectangle {
-            Layout.fillWidth: true; height: 52
-            color: Theme.subtleSectionBackground; radius: Theme.radiusSm
-            border.color: Theme.cardBorder; border.width: 1
-            ColumnLayout {
-                anchors { fill: parent; margins: 7 }
-                spacing: 1
-                Label { text: "MIN TEMP"; color: Theme.bodyColor; font.pixelSize: 9; font.letterSpacing: 1 }
-                Label {
-                    text: s.min !== undefined ? s.min + "  #" + s.minIndex : "—"
-                    color: Theme.sensorLow
-                    font.pixelSize: 15; font.weight: Font.Bold
+        ColumnLayout {
+            id: statsLayout
+            anchors { fill: parent; margins: 10 }
+            spacing: 8
+
+            // Min Temp Row
+            RowLayout {
+                Layout.fillWidth: true
+                Label { text: "Min Temp"; color: Theme.bodyColor; font.pixelSize: 11 }
+                Item { Layout.fillWidth: true }
+                RowLayout {
+                    spacing: 4
+                    Label {
+                        text: s.min !== undefined ? s.min : "—"
+                        color: Theme.sensorLow
+                        font.pixelSize: 13; font.weight: Font.Bold
+                    }
+                    Label {
+                        text: s.minIndex !== undefined ? "#" + s.minIndex : ""
+                        color: Theme.bodyColor
+                        font.pixelSize: 10
+                    }
                 }
             }
-        }
 
-        // MAX TEMP
-        Rectangle {
-            Layout.fillWidth: true; height: 52
-            color: Theme.subtleSectionBackground; radius: Theme.radiusSm
-            border.color: Theme.cardBorder; border.width: 1
-            ColumnLayout {
-                anchors { fill: parent; margins: 7 }
-                spacing: 1
-                Label { text: "MAX TEMP"; color: Theme.bodyColor; font.pixelSize: 9; font.letterSpacing: 1 }
-                Label {
-                    text: s.max !== undefined ? s.max + "  #" + s.maxIndex : "—"
-                    color: Theme.sensorHigh
-                    font.pixelSize: 15; font.weight: Font.Bold
+            // Max Temp Row
+            RowLayout {
+                Layout.fillWidth: true
+                Label { text: "Max Temp"; color: Theme.bodyColor; font.pixelSize: 11 }
+                Item { Layout.fillWidth: true }
+                RowLayout {
+                    spacing: 4
+                    Label {
+                        text: s.max !== undefined ? s.max : "—"
+                        color: Theme.sensorHigh
+                        font.pixelSize: 13; font.weight: Font.Bold
+                    }
+                    Label {
+                        text: s.maxIndex !== undefined ? "#" + s.maxIndex : ""
+                        color: Theme.bodyColor
+                        font.pixelSize: 10
+                    }
                 }
             }
-        }
 
-        // DIFFERENTIAL
-        Rectangle {
-            Layout.fillWidth: true; height: 52
-            color: Theme.subtleSectionBackground; radius: Theme.radiusSm
-            border.color: Theme.cardBorder; border.width: 1
-            ColumnLayout {
-                anchors { fill: parent; margins: 7 }
-                spacing: 1
-                Label { text: "DIFFERENTIAL"; color: Theme.bodyColor; font.pixelSize: 9; font.letterSpacing: 1 }
+            Rectangle { Layout.fillWidth: true; height: 1; color: Theme.cardBorder }
+
+            // Differential Row
+            RowLayout {
+                Layout.fillWidth: true
+                Label { text: "Differential"; color: Theme.bodyColor; font.pixelSize: 11 }
+                Item { Layout.fillWidth: true }
                 Label {
                     text: s.diff !== undefined ? s.diff : "—"
                     color: Theme.headingColor
-                    font.pixelSize: 15; font.weight: Font.Bold
+                    font.pixelSize: 13; font.weight: Font.Bold
                 }
             }
-        }
 
-        // AVERAGE
-        Rectangle {
-            Layout.fillWidth: true; height: 52
-            color: Theme.subtleSectionBackground; radius: Theme.radiusSm
-            border.color: Theme.cardBorder; border.width: 1
-            ColumnLayout {
-                anchors { fill: parent; margins: 7 }
-                spacing: 1
-                Label { text: "AVERAGE"; color: Theme.bodyColor; font.pixelSize: 9; font.letterSpacing: 1 }
+            // Average Row
+            RowLayout {
+                Layout.fillWidth: true
+                Label { text: "Average"; color: Theme.bodyColor; font.pixelSize: 11 }
+                Item { Layout.fillWidth: true }
                 Label {
                     text: s.avg !== undefined ? s.avg : "—"
                     color: Theme.headingColor
-                    font.pixelSize: 15; font.weight: Font.Bold
+                    font.pixelSize: 13; font.weight: Font.Bold
                 }
             }
-        }
-    }
 
-    // SIGMA — full-width
-    Rectangle {
-        Layout.fillWidth: true; height: 44
-        color: Theme.subtleSectionBackground; radius: Theme.radiusSm
-        border.color: Theme.cardBorder; border.width: 1
-        RowLayout {
-            anchors { fill: parent; leftMargin: 7; rightMargin: 7; topMargin: 4; bottomMargin: 4 }
-            ColumnLayout {
-                spacing: 1
-                Label { text: "SIGMA (σ)"; color: Theme.bodyColor; font.pixelSize: 9; font.letterSpacing: 1 }
-                Label { text: "3σ";        color: Theme.bodyColor; font.pixelSize: 9; font.letterSpacing: 1 }
-            }
-            Item { Layout.fillWidth: true }
-            ColumnLayout {
-                spacing: 1
+            Rectangle { Layout.fillWidth: true; height: 1; color: Theme.cardBorder }
+
+            // Sigma Row
+            RowLayout {
+                Layout.fillWidth: true
+                Label { text: "Sigma (σ)"; color: Theme.bodyColor; font.pixelSize: 11 }
+                Item { Layout.fillWidth: true }
                 Label {
                     text: s.sigma !== undefined ? s.sigma : "—"
                     color: Theme.headingColor
-                    font.pixelSize: 15; font.weight: Font.Bold
-                    Layout.alignment: Qt.AlignRight
+                    font.pixelSize: 13; font.weight: Font.Bold
                 }
+            }
+
+            // 3-Sigma Row
+            RowLayout {
+                Layout.fillWidth: true
+                Label { text: "3σ Value"; color: Theme.bodyColor; font.pixelSize: 11 }
+                Item { Layout.fillWidth: true }
                 Label {
                     text: s.threeSigma !== undefined ? s.threeSigma : "—"
                     color: Theme.bodyColor
                     font.pixelSize: 12; font.weight: Font.Medium
-                    Layout.alignment: Qt.AlignRight
                 }
             }
         }
     }
 
-    Item { height: 8 }
+    Item { height: 12 }
     Rectangle { Layout.fillWidth: true; height: 1; color: Theme.cardBorder }
-    Item { height: 8 }
+    Item { height: 12 }
 
     // ── DISPLAY ───────────────────────────────────────────────────────────
     Label {
@@ -136,7 +138,8 @@ ColumnLayout {
         font.pixelSize: 10
         font.letterSpacing: 1.8
         font.weight: Font.Medium
-        bottomPadding: 4
+        topPadding: 6
+        bottomPadding: 8
     }
 
     CheckBox {
@@ -164,9 +167,9 @@ ColumnLayout {
         }
     }
 
-    Item { height: 8 }
+    Item { height: 12 }
     Rectangle { Layout.fillWidth: true; height: 1; color: Theme.cardBorder }
-    Item { height: 8 }
+    Item { height: 12 }
 
     // ── THRESHOLDS ────────────────────────────────────────────────────────
     Label {
@@ -175,10 +178,16 @@ ColumnLayout {
         font.pixelSize: 10
         font.letterSpacing: 1.8
         font.weight: Font.Medium
-        bottomPadding: 4
+        topPadding: 6
+        bottomPadding: 8
     }
 
-    Label { text: "Set Point (°C)"; color: Theme.bodyColor; font.pixelSize: 11 }
+    Label {
+        text: "Set Point (°C)"
+        color: Theme.bodyColor
+        font.pixelSize: 11
+        bottomPadding: 3
+    }
     TextField {
         id: spField
         Layout.fillWidth: true
@@ -198,9 +207,14 @@ ColumnLayout {
         onEditingFinished: pushThresholds()
     }
 
-    Item { height: 4 }
+    Item { height: 10 }
 
-    Label { text: "Margin (±°C)"; color: Theme.bodyColor; font.pixelSize: 11 }
+    Label {
+        text: "Margin (±°C)"
+        color: Theme.bodyColor
+        font.pixelSize: 11
+        bottomPadding: 3
+    }
     TextField {
         id: mgField
         Layout.fillWidth: true
@@ -220,7 +234,7 @@ ColumnLayout {
         onEditingFinished: pushThresholds()
     }
 
-    Item { height: 4 }
+    Item { height: 10 }
 
     CheckBox {
         id: autoCheck
diff --git a/src/pygui/ISC/Tabs/components/SourcePanel.qml b/src/pygui/ISC/Tabs/components/SourcePanel.qml
index 8b6bd20..f92451e 100644
--- a/src/pygui/ISC/Tabs/components/SourcePanel.qml
+++ b/src/pygui/ISC/Tabs/components/SourcePanel.qml
@@ -6,13 +6,45 @@ import ISC
 ColumnLayout {
     spacing: 6
 
-    // ── Section label ─────────────────────────────────────────────────────
-    Label {
-        text: "SOURCE"
-        color: Theme.bodyColor
-        font.pixelSize: 10
-        font.letterSpacing: 1.8
-        font.weight: Font.Medium
+    // ── Section label & Refresh ───────────────────────────────────────────
+    RowLayout {
+        Layout.fillWidth: true
+        spacing: 4
+
+        Label {
+            text: "SOURCE"
+            color: Theme.bodyColor
+            font.pixelSize: 10
+            font.letterSpacing: 1.8
+            font.weight: Font.Medium
+            topPadding: 6
+            bottomPadding: 8
+            Layout.fillWidth: true
+            Layout.alignment: Qt.AlignVCenter
+        }
+
+        Button {
+            id: refreshBtn
+            text: "⟳"
+            implicitWidth: 26
+            implicitHeight: 26
+            hoverEnabled: true
+            font.pixelSize: 14
+            background: Rectangle {
+                color: refreshBtn.pressed ? Theme.buttonPressed
+                     : refreshBtn.hovered ? Theme.buttonNeutralHover
+                     : "transparent"
+                radius: Theme.radiusSm
+            }
+            contentItem: Text {
+                text: parent.text
+                color: Theme.bodyColor
+                font: parent.font
+                horizontalAlignment: Text.AlignHCenter
+                verticalAlignment: Text.AlignVCenter
+            }
+            onClicked: file_browser.refreshFiles()
+        }
     }
 
     // ── Directory button ──────────────────────────────────────────────────
@@ -82,7 +114,7 @@ ColumnLayout {
         delegate: ItemDelegate {
             id: fileItem
             width: ListView.view.width
-            padding: 0
+            padding: 8
             highlighted: false
             focusPolicy: Qt.NoFocus
 
@@ -131,11 +163,13 @@ ColumnLayout {
 
             contentItem: RowLayout {
                 spacing: 8
-                anchors.margins: 8
 
                 // Wafer-type avatar (circle)
                 Rectangle {
-                    width: 28; height: 28
+                    implicitWidth: 28; implicitHeight: 28
+                    Layout.preferredWidth: 28
+                    Layout.preferredHeight: 28
+                    Layout.alignment: Qt.AlignVCenter
                     radius: 14
                     color: {
                         var t = modelData.waferType
@@ -158,9 +192,9 @@ ColumnLayout {
                     spacing: 1
                     Layout.fillWidth: true
 
-                    // Primary: serial number
+                    // Primary: wafer type + serial number
                     Label {
-                        text: modelData.serialNumber || modelData.baseName
+                        text: modelData.serialNumber ? (modelData.waferType + modelData.serialNumber) : modelData.baseName
                         color: Theme.headingColor
                         font.pixelSize: 13
                         font.weight: Font.Bold
diff --git a/src/pygui/ISC/Tabs/components/TransportBar.qml b/src/pygui/ISC/Tabs/components/TransportBar.qml
index a544353..590bb08 100644
--- a/src/pygui/ISC/Tabs/components/TransportBar.qml
+++ b/src/pygui/ISC/Tabs/components/TransportBar.qml
@@ -26,6 +26,26 @@ RowLayout {
         }
     }
 
+    // Frame counter badge on the left
+    Rectangle {
+        id: frameCounter
+        implicitWidth: frameCounterText.implicitWidth + 16
+        implicitHeight: 32
+        color: Theme.fieldBackground
+        border.color: Theme.cardBorder
+        border.width: Theme.borderThin
+        radius: Theme.radiusSm
+
+        Text {
+            id: frameCounterText
+            anchors.centerIn: parent
+            text: "Frame " + (streamController.frameIndex + 1) + " / " + streamController.frameTotal
+            color: Theme.headingColor
+            font.pixelSize: 11
+            font.weight: Font.Medium
+        }
+    }
+
     // Left fill — centers the button cluster
     Item { Layout.fillWidth: true }
 
@@ -80,12 +100,4 @@ RowLayout {
             streamController.setSpeed(speeds[idx])
         }
     }
-
-    Item { width: 8 }
-
-    Label {
-        text: "frame " + (streamController.frameIndex + 1) + " / " + streamController.frameTotal
-        color: Theme.bodyColor
-        font.pixelSize: 11
-    }
 }
diff --git a/src/pygui/backend/data/file_browser.py b/src/pygui/backend/data/file_browser.py
index db70f30..45c20ad 100644
--- a/src/pygui/backend/data/file_browser.py
+++ b/src/pygui/backend/data/file_browser.py
@@ -123,6 +123,13 @@ class FileBrowser(QObject):
                 wafer_type = metadata.get_wafer_type().upper() or (csv_path.stem[0].upper() if csv_path.stem else "")
                 date_str = metadata.string_date_format()
                 serial = metadata.wafer[1:] if len(metadata.wafer) > 1 else ""
+                if not serial:
+                    stem = csv_path.stem
+                    serial = stem[1:] if len(stem) > 1 else ""
+                if "-" in serial:
+                    serial = serial.split("-")[0]
+                if "_" in serial:
+                    serial = serial.split("_")[0]
                 time_str = date_str[11:] if len(date_str) > 10 else ""
                 self._files.append(
                     {
@@ -142,13 +149,18 @@ class FileBrowser(QObject):
                 )
             except Exception:
                 stem = csv_path.stem
+                serial_fallback = stem[1:] if len(stem) > 1 else ""
+                if "-" in serial_fallback:
+                    serial_fallback = serial_fallback.split("-")[0]
+                if "_" in serial_fallback:
+                    serial_fallback = serial_fallback.split("_")[0]
                 self._files.append(
                     {
                         "selected": selected_state.get(str(csv_path), False),
                         "baseName": stem,
                         "wafer": stem,
                         "waferType": stem[0].upper() if stem else "",
-                        "serialNumber": stem[1:] if len(stem) > 1 else "",
+                        "serialNumber": serial_fallback,
                         "date": "",
                         "timeStr": "",
                         "chamber": "",
diff --git a/src/pygui/backend/visualization/wafer_map_item.py b/src/pygui/backend/visualization/wafer_map_item.py
index b372992..022cd09 100644
--- a/src/pygui/backend/visualization/wafer_map_item.py
+++ b/src/pygui/backend/visualization/wafer_map_item.py
@@ -229,8 +229,8 @@ class WaferMapItem(QQuickPaintedItem):
         return groups
 
     def _scale(self, ds: int, r_mm: float) -> float:
-        """Pixels per mm. The wafer radius maps to ds//2 - 4 px."""
-        return (ds / 2 - 4) / r_mm
+        """Pixels per mm. The wafer radius maps to ds//2 - 24 px."""
+        return (ds / 2 - 24) / r_mm
 
     def _to_px(self, x_mm: float, y_mm: float, cx: int, cy: int, scale: float) -> tuple[int, int]:
         """Center-origin mm → pixel (top-left origin). Y is flipped."""