diff --git a/src/org/nschmidt/ldparteditor/data/VM01SelectHelper.java b/src/org/nschmidt/ldparteditor/data/VM01SelectHelper.java
index b0887f639..a865fc9b6 100644
--- a/src/org/nschmidt/ldparteditor/data/VM01SelectHelper.java
+++ b/src/org/nschmidt/ldparteditor/data/VM01SelectHelper.java
@@ -1812,7 +1812,7 @@ private List<GData1> subfilesWithOneVertex() {
                 .toList();
     }
 
-    public Vector4f getSelectionCenter() {
+    public Vector3d getSelectionCenter() {
 
         final Set<Vertex> objectVertices = Collections.newSetFromMap(new ThreadsafeSortedMap<>());
         objectVertices.addAll(selectedVertices);
@@ -1856,18 +1856,24 @@ public Vector4f getSelectionCenter() {
             }
         }
         if (!objectVertices.isEmpty()) {
-            float x = 0f;
-            float y = 0f;
-            float z = 0f;
-            for (Vertex vertex : objectVertices) {
-                x = x + vertex.x;
-                y = y + vertex.y;
-                z = z + vertex.z;
+            final int count = objectVertices.size();
+            if (count == 1) {
+                final Vertex v = objectVertices.iterator().next();
+                return new Vector3d(v);
+            } else {
+                BigDecimal c = BigDecimal.valueOf(count);
+                BigDecimal sumX = BigDecimal.ZERO;
+                BigDecimal sumY = BigDecimal.ZERO;
+                BigDecimal sumZ = BigDecimal.ZERO;
+                for (Vertex vertex : objectVertices) {
+                    sumX = sumX.add(vertex.xp);
+                    sumY = sumY.add(vertex.yp);
+                    sumZ = sumZ.add(vertex.zp);
+                }
+                return new Vector3d(sumX.divide(c, Threshold.MC), sumY.divide(c, Threshold.MC), sumZ.divide(c, Threshold.MC));
             }
-            float count = objectVertices.size();
-            return new Vector4f(x / count, y / count, z / count, 1f);
         } else {
-            return new Vector4f(0f, 0f, 0f, 1f);
+            return new Vector3d();
         }
     }
 
diff --git a/src/org/nschmidt/ldparteditor/shell/editor3d/toolitem/ManipulatorToolItem.java b/src/org/nschmidt/ldparteditor/shell/editor3d/toolitem/ManipulatorToolItem.java
index adcad24c3..ee20c0417 100644
--- a/src/org/nschmidt/ldparteditor/shell/editor3d/toolitem/ManipulatorToolItem.java
+++ b/src/org/nschmidt/ldparteditor/shell/editor3d/toolitem/ManipulatorToolItem.java
@@ -25,6 +25,7 @@
 import org.nschmidt.ldparteditor.helper.Manipulator;
 import org.nschmidt.ldparteditor.helper.WidgetSelectionHelper;
 import org.nschmidt.ldparteditor.helper.math.MatrixOperations;
+import org.nschmidt.ldparteditor.helper.math.Vector3d;
 import org.nschmidt.ldparteditor.i18n.I18n;
 import org.nschmidt.ldparteditor.opengl.OpenGLRenderer;
 import org.nschmidt.ldparteditor.project.Project;
@@ -470,12 +471,12 @@ public static void mntmManipulatorCameraToPos() {
     @SuppressWarnings("java:S2111")
     public static void mntmManipulatorToAverage() {
         if (Project.getFileToEdit() != null) {
-            Vector4f avg = Project.getFileToEdit().getVertexManager().getSelectionCenter();
+            Vector3d avg = Project.getFileToEdit().getVertexManager().getSelectionCenter();
             for (OpenGLRenderer renderer : Editor3DWindow.getRenders()) {
                 Composite3D c3d = renderer.getC3D();
                 if (c3d.getLockableDatFileReference().equals(Project.getFileToEdit())) {
-                    c3d.getManipulator().getPosition().set(avg.x, avg.y, avg.z, 1f);
-                    c3d.getManipulator().setAccuratePosition(new BigDecimal(avg.x / 1000f), new BigDecimal(avg.y / 1000f), new BigDecimal(avg.z / 1000f));
+                    c3d.getManipulator().getPosition().set(avg.x.floatValue() * 1000f, avg.y.floatValue() * 1000f, avg.z.floatValue() * 1000f, 1f);
+                    c3d.getManipulator().setAccuratePosition(avg.x, avg.y, avg.z);
                 }
             }
         }