diff --git a/Editor/ClusterViewer.cs b/Editor/ClusterViewer.cs
index 213c25a..dbc6984 100644
--- a/Editor/ClusterViewer.cs
+++ b/Editor/ClusterViewer.cs
@@ -332,9 +332,11 @@ namespace NanoBrain {
                         drawnArrays.Add(clusterReceptor.nucleiArray);
                     }
                     // Oops...
-                    // else if (synapse.neuron is Cluster cluster && cluster.clusterArray != null) {
-                        
-                    // }
+                    else if (synapse.neuron.parent is Cluster cluster && cluster.clusterArray != null) {
+                        if (drawnArrays.Contains(cluster.clusterArray.clusters))
+                            continue;
+                        drawnArrays.Add(cluster.clusterArray.clusters);
+                    }
                     if (synapse.neuron is Neuron synapseNeuron) {
                         float value = synapseNeuron.outputMagnitude * synapse.weight;
                         // Debug.Log($"{synapse.nucleus.name}: {value}  {length(synapse.nucleus.outputValue)} {synapse.weight}");
diff --git a/Runtime/Scripts/Core/ClusterArray.cs b/Runtime/Scripts/Core/ClusterArray.cs
index 58a9e14..490c216 100644
--- a/Runtime/Scripts/Core/ClusterArray.cs
+++ b/Runtime/Scripts/Core/ClusterArray.cs
@@ -66,9 +66,11 @@ namespace NanoBrain {
 
             for (int i = 0; i < this.clusters.Length; i++)
                 newClusters[i] = this.clusters[i];
-            Cluster cluster = this.clusters[0];
-            newClusters[newLength - 1] = cluster.Clone(prefab) as Cluster;
-            newClusters[newLength - 1].name = $"{baseName}: {newLength - 1}";
+            Cluster sourceCluster = this.clusters[0];
+            Cluster newCluster = sourceCluster.Clone(prefab) as Cluster;
+            newCluster.name = $"{baseName}: {newLength - 1}";
+            newCluster.clusterArray = this;
+            newClusters[newLength - 1] = newCluster;
             this.clusters = newClusters;
         }