diff --git a/restoration/source410/BT_L4/BTL4GAUG.CPP b/restoration/source410/BT_L4/BTL4GAUG.CPP
index 4ea43350..c6c7e513 100644
--- a/restoration/source410/BT_L4/BTL4GAUG.CPP
+++ b/restoration/source410/BT_L4/BTL4GAUG.CPP
@@ -2789,6 +2789,27 @@ SegmentArc270::SegmentArc270(
 	Check_Fpu();
 }
 
+//
+// Execute -- scale the raw fraction by the 270-degree span, draw, then
+// put the raw value back.  Restoring matters: the connection only
+// rewrites currentValue when its source changes, so scaling in place
+// would compound frame after frame and walk the dial to zero.
+//
+void
+	SegmentArc270::Execute()
+{
+	Check(this);
+
+	Scalar
+		raw = currentValue;
+
+	currentValue = raw * segmentSpan;
+	SegmentArc::Execute();
+	currentValue = raw;
+
+	Check_Fpu();
+}
+
 SegmentArc270::~SegmentArc270()					// @004c66b3 (base chain)
 {
 }
diff --git a/restoration/source410/BT_L4/BTL4GAUG.HPP b/restoration/source410/BT_L4/BTL4GAUG.HPP
index 90b4c7b4..a8abbca1 100644
--- a/restoration/source410/BT_L4/BTL4GAUG.HPP
+++ b/restoration/source410/BT_L4/BTL4GAUG.HPP
@@ -566,8 +566,16 @@
 			const char *identification_string);
 		~SegmentArc270();							// dtor thunk @004c66b3
 
-		// No Execute override: inherits the engine SegmentArc::Execute
-		// (@00474300), which draws the lit segments up to currentValue.
+		//
+		// Execute applies the 270-degree SPAN.  The engine base has no
+		// span member, so a derived Execute is the only place the 0.75
+		// can reach the draw -- the same role SegmentArcRatio's Execute
+		// plays with its own copy.  Without it the dial lit all 20
+		// segments at PercentDone 1.0 where the shipped cockpit lights
+		// 15, leaving the quarter gap (the A/B rig's last MFD delta:
+		// four extra spokes at the upper-left of every weapon disc).
+		//
+		void	Execute();
 	protected:
 		Scalar	segmentSpan;						// @0xC0  this[0x30]
 	};