diff --git a/core/src/net/sf/openrocket/rocketcomponent/MassObject.java b/core/src/net/sf/openrocket/rocketcomponent/MassObject.java
index 58adc3f39..69ecdc658 100644
--- a/core/src/net/sf/openrocket/rocketcomponent/MassObject.java
+++ b/core/src/net/sf/openrocket/rocketcomponent/MassObject.java
@@ -22,6 +22,7 @@ import net.sf.openrocket.util.MathUtil;
 public abstract class MassObject extends InternalComponent {
 	
 	protected double radius;
+	private boolean autoRadius = false;
 	
 	private double radialPosition;
 	private double radialDirection;
@@ -67,6 +68,22 @@ public abstract class MassObject extends InternalComponent {
 	
 	
 	public double getRadius() {
+		if (autoRadius) {
+			if (parent == null) {
+				return radius;
+			}
+			if (parent instanceof NoseCone) {
+				return ((NoseCone) parent).getAftRadius();
+			} else if (parent instanceof Transition) {
+				double foreRadius = ((Transition) parent).getForeRadius();
+				double aftRadius = ((Transition) parent).getAftRadius();
+				return (Math.max(foreRadius, aftRadius));
+			} else if (parent instanceof BodyComponent) {
+				return ((BodyComponent) parent).getInnerRadius();
+			} else if (parent instanceof RingComponent) {
+				return ((RingComponent) parent).getInnerRadius();
+			}
+		}
 		return radius;
 	}
 	
@@ -80,14 +97,32 @@ public abstract class MassObject extends InternalComponent {
 			}
 		}
 
-		if (MathUtil.equals(this.radius, radius)) {
+		if (MathUtil.equals(this.radius, radius) && (!autoRadius))
 			return;
-		}
+
+		this.autoRadius = false;
 		this.radius = radius;
 		fireComponentChangeEvent(ComponentChangeEvent.MASS_CHANGE);
 	}
-	
-	
+
+	public boolean isRadiusAutomatic() {
+		return autoRadius;
+	}
+
+	public void setRadiusAutomatic(boolean auto) {
+		for (RocketComponent listener : configListeners) {
+			if (listener instanceof Parachute) {
+				((Parachute) listener).setRadiusAutomatic(auto);
+			}
+		}
+
+		if (autoRadius == auto)
+			return;
+
+		autoRadius = auto;
+
+		fireComponentChangeEvent(ComponentChangeEvent.BOTH_CHANGE);
+	}
 	
 	public final double getRadialPosition() {
 		return radialPosition;
diff --git a/core/src/net/sf/openrocket/rocketcomponent/Parachute.java b/core/src/net/sf/openrocket/rocketcomponent/Parachute.java
index e7b2a12c7..75a634266 100644
--- a/core/src/net/sf/openrocket/rocketcomponent/Parachute.java
+++ b/core/src/net/sf/openrocket/rocketcomponent/Parachute.java
@@ -15,7 +15,6 @@ public class Parachute extends RecoveryDevice {
 	private double diameter;
 	private final double InitialPackedLength = this.length;
 	private final double InitialPackedRadius = this.radius;
-	private boolean autoRadius;
 
 	private Material lineMaterial;
 	private int lineCount = 6;
@@ -146,64 +145,6 @@ public class Parachute extends RecoveryDevice {
 		//// Parachute
 		return trans.get("Parachute.Parachute");
 	}
-
-	@Override
-	public void setRadius(double radius) {
-		radius = Math.max(radius, 0);
-
-		for (RocketComponent listener : configListeners) {
-			if (listener instanceof MassObject) {
-				((MassObject) listener).setRadius(radius);
-			}
-		}
-
-		if (MathUtil.equals(this.radius, radius) && (!autoRadius))
-			return;
-
-		this.autoRadius = false;
-		this.radius = radius;
-		fireComponentChangeEvent(ComponentChangeEvent.MASS_CHANGE);
-	}
-
-	@Override
-	public double getRadius() {
-		if (autoRadius) {
-			if (parent == null) {
-				return radius;
-			}
-			if (parent instanceof NoseCone) {
-				return ((NoseCone) parent).getAftRadius();
-			} else if (parent instanceof Transition) {
-				double foreRadius = ((Transition) parent).getForeRadius();
-				double aftRadius = ((Transition) parent).getAftRadius();
-				return (Math.max(foreRadius, aftRadius));
-			} else if (parent instanceof BodyComponent) {
-				return ((BodyComponent) parent).getInnerRadius();
-			} else if (parent instanceof RingComponent) {
-				return ((RingComponent) parent).getInnerRadius();
-			}
-		}
-		return radius;
-	}
-
-	public boolean isRadiusAutomatic() {
-		return autoRadius;
-	}
-
-	public void setRadiusAutomatic(boolean auto) {
-		for (RocketComponent listener : configListeners) {
-			if (listener instanceof Parachute) {
-				((Parachute) listener).setRadiusAutomatic(auto);
-			}
-		}
-
-		if (autoRadius == auto)
-			return;
-
-		autoRadius = auto;
-
-		fireComponentChangeEvent(ComponentChangeEvent.BOTH_CHANGE);
-	}
 	
 	@Override
 	public boolean allowsChildren() {
diff --git a/swing/src/net/sf/openrocket/gui/configdialog/MassComponentConfig.java b/swing/src/net/sf/openrocket/gui/configdialog/MassComponentConfig.java
index 4f510fc0f..d7177e998 100644
--- a/swing/src/net/sf/openrocket/gui/configdialog/MassComponentConfig.java
+++ b/swing/src/net/sf/openrocket/gui/configdialog/MassComponentConfig.java
@@ -4,6 +4,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 
 import javax.swing.JButton;
+import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
@@ -105,7 +106,12 @@ public class MassComponentConfig extends RocketComponentConfig {
 		
 		panel.add(new UnitSelector(od), "growx");
 		panel.add(new BasicSlider(od.getSliderModel(0, 0.04, 0.2)), "w 100lp, wrap");
-		
+
+		////// Automatic
+		JCheckBox checkAutoPackedRadius = new JCheckBox(od.getAutomaticAction());
+		checkAutoPackedRadius.setText(trans.get("TransitionCfg.checkbox.Automatic"));
+		panel.add(checkAutoPackedRadius, "skip, span 2, wrap 30lp");
+
 		
 		////  Position
 		//// Position relative to:
diff --git a/swing/src/net/sf/openrocket/gui/configdialog/ShockCordConfig.java b/swing/src/net/sf/openrocket/gui/configdialog/ShockCordConfig.java
index 745ddb649..4403f0049 100644
--- a/swing/src/net/sf/openrocket/gui/configdialog/ShockCordConfig.java
+++ b/swing/src/net/sf/openrocket/gui/configdialog/ShockCordConfig.java
@@ -112,8 +112,11 @@ public class ShockCordConfig extends RocketComponentConfig {
 		
 		panel2.add(new UnitSelector(od), "growx");
 		panel2.add(new BasicSlider(od.getSliderModel(0, 0.04, 0.2)), "w 100lp, wrap");
-		
 
+		////// Automatic
+		JCheckBox checkAutoPackedRadius = new JCheckBox(od.getAutomaticAction());
+		checkAutoPackedRadius.setText(trans.get("TransitionCfg.checkbox.Automatic"));
+		panel2.add(checkAutoPackedRadius, "skip, span 2, wrap");
 
 		//// General and General properties
 		tabbedPane.insertTab(trans.get("ShockCordCfg.tab.General"), null, panel,
diff --git a/swing/src/net/sf/openrocket/gui/configdialog/StreamerConfig.java b/swing/src/net/sf/openrocket/gui/configdialog/StreamerConfig.java
index c16ea1638..e05b2ad94 100644
--- a/swing/src/net/sf/openrocket/gui/configdialog/StreamerConfig.java
+++ b/swing/src/net/sf/openrocket/gui/configdialog/StreamerConfig.java
@@ -185,8 +185,13 @@ public class StreamerConfig extends RecoveryDeviceConfig {
 		panel.add(spin, "growx");
 		
 		panel.add(new UnitSelector(od), "growx");
-		panel.add(new BasicSlider(od.getSliderModel(0, 0.04, 0.2)), "w 100lp, wrap 30lp");
-		
+		panel.add(new BasicSlider(od.getSliderModel(0, 0.04, 0.2)), "w 100lp, wrap");
+
+		////// Automatic
+		JCheckBox checkAutoPackedRadius = new JCheckBox(od.getAutomaticAction());
+		checkAutoPackedRadius.setText(trans.get("TransitionCfg.checkbox.Automatic"));
+		panel.add(checkAutoPackedRadius, "skip, span 2, wrap 30lp");
+
 		
 		//// Deployment
 		//// Deploys at: