diff --git a/base/uk.ac.stfc.isis.ibex.synoptic.tests/src/uk/ac/stfc/isis/ibex/synoptic/tests/model/desc/TargetDescriptionTest.java b/base/uk.ac.stfc.isis.ibex.synoptic.tests/src/uk/ac/stfc/isis/ibex/synoptic/tests/model/desc/TargetDescriptionTest.java
index 96b7509852..cd3f12a6ee 100644
--- a/base/uk.ac.stfc.isis.ibex.synoptic.tests/src/uk/ac/stfc/isis/ibex/synoptic/tests/model/desc/TargetDescriptionTest.java
+++ b/base/uk.ac.stfc.isis.ibex.synoptic.tests/src/uk/ac/stfc/isis/ibex/synoptic/tests/model/desc/TargetDescriptionTest.java
@@ -122,6 +122,23 @@ public void copied_object_has_target_type_that_is_not_linked_to_source_object()
         assertEquals(TargetType.OPI, source.type());
         assertEquals(TargetType.COMPONENT, copied.type());
     }
+    
+    @Test
+    public void copied_object_has_macros_that_are_not_linked_to_source_object() {
+    	final String sourcePropertyValue = "SOURCE";
+    	final String copiedPropertyValue = "COPIED";
+    	
+    	// Arrange
+    	source.getProperties().get(0).setValue(sourcePropertyValue);
+    	TargetDescription copied = new TargetDescription(source);
+    	
+        // Act (should not affect property of source).
+        copied.getProperties().get(0).setValue(copiedPropertyValue);
+
+        // Assert
+        assertEquals(source.getProperties().get(0).getValue(), sourcePropertyValue);
+        assertEquals(copied.getProperties().get(0).getValue(), copiedPropertyValue);
+    }
 
     @Test
     public void copied_object_has_same_properties_as_source_object_with_no_name_changes() {
diff --git a/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/ComponentDescription.java b/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/ComponentDescription.java
index f818afdb0b..ed56a33247 100644
--- a/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/ComponentDescription.java
+++ b/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/ComponentDescription.java
@@ -21,6 +21,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
@@ -98,10 +99,7 @@ private ComponentDescription(ComponentDescription other, boolean isTopLevelCopy,
         this.type = other.type;
         this.target = other.target != null ? new TargetDescription(other.target) : null;
 
-        this.pvs = new ArrayList<>();
-        for (PV pv : other.pvs) {
-            this.pvs.add(new PV(pv));
-        }
+        this.pvs = other.pvs().stream().map(PV::new).collect(Collectors.toList());
 
         this.components = new ArrayList<>();
         for (ComponentDescription cd : other.components) {
diff --git a/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/Property.java b/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/Property.java
index 4f2e194fcc..52489f1b22 100644
--- a/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/Property.java
+++ b/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/Property.java
@@ -43,6 +43,15 @@ public class Property extends ModelObject {
 	public Property() {
 	}
 	
+	/**
+	 * Clones an existing property.
+	 * 
+	 * @param other the property to clone
+	 */
+	public Property(Property other) {
+		this(other.key, other.value);
+	}
+	
     /**
      * Instantiates a new property.
      *
diff --git a/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/TargetDescription.java b/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/TargetDescription.java
index 7902410fec..88742f56a0 100644
--- a/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/TargetDescription.java
+++ b/base/uk.ac.stfc.isis.ibex.synoptic/src/uk/ac/stfc/isis/ibex/synoptic/model/desc/TargetDescription.java
@@ -22,6 +22,7 @@
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
@@ -41,7 +42,7 @@ public class TargetDescription {
 	
 	@XmlElementWrapper(name = "properties")
 	@XmlElement(name = "property", type = Property.class)
-	private ArrayList<Property> properties = new ArrayList<>();
+	private List<Property> properties = new ArrayList<>();
 	
     /**
      * Default constructor, required due to existence of copy constructor.
@@ -69,7 +70,7 @@ public TargetDescription(String name, TargetType type) {
     public TargetDescription(TargetDescription other) {
         this.name = other.name;
         this.type = other.type;
-        this.properties = new ArrayList<>(other.getProperties());
+        this.properties = other.getProperties().stream().map(Property::new).collect(Collectors.toList());
     }
 
     /**