diff --git a/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtl.java b/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtl.java
index d47c043fd..86a2bc063 100644
--- a/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtl.java
+++ b/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtl.java
@@ -37,7 +37,7 @@ import java.util.List;
 /**
  * Default implementation of an Mtl (material)
  */
-final class DefaultMtl implements Mtl {
+public final class DefaultMtl implements Mtl {
     /**
      * The name of this material
      */
@@ -210,7 +210,7 @@ final class DefaultMtl implements Mtl {
      *
      * @param name The name of this material
      */
-    DefaultMtl(String name) {
+    public DefaultMtl(String name) {
         this.name = name;
         this.reflOptions = new ArrayList<TextureOptions>();
     }
diff --git a/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtlWriter.java b/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtlWriter.java
index a11670060..46327ea4d 100644
--- a/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtlWriter.java
+++ b/core/src/net/sf/openrocket/file/wavefrontobj/DefaultMtlWriter.java
@@ -79,9 +79,11 @@ public class DefaultMtlWriter {
      *
      * @param mtl    The {@link Mtl}
      * @param writer The writer
-     * @throws IOException If an IO error occurs
+     * @throws IOExcept
+     *
+     * ion If an IO error occurs
      */
-    private static void write(Mtl mtl, Writer writer)
+    public static void write(Mtl mtl, Writer writer)
             throws IOException {
         writer.write(createString(mtl));
         writer.flush();
diff --git a/core/src/net/sf/openrocket/file/wavefrontobj/DefaultTextureOptions.java b/core/src/net/sf/openrocket/file/wavefrontobj/DefaultTextureOptions.java
index 2d364adf7..4d8e51a5b 100644
--- a/core/src/net/sf/openrocket/file/wavefrontobj/DefaultTextureOptions.java
+++ b/core/src/net/sf/openrocket/file/wavefrontobj/DefaultTextureOptions.java
@@ -36,7 +36,7 @@ import java.util.Objects;
 /**
  * Default implementation of {@link TextureOptions}
  */
-final class DefaultTextureOptions implements TextureOptions {
+public final class DefaultTextureOptions implements TextureOptions {
     /**
      * The file name
      */
@@ -110,7 +110,7 @@ final class DefaultTextureOptions implements TextureOptions {
     /**
      * Default constructor
      */
-    DefaultTextureOptions() {
+    public DefaultTextureOptions() {
         // Default constructor
     }
 
diff --git a/core/test/net/sf/openrocket/file/wavefrontobj/export/OBJExporterFactoryTest.java b/core/test/net/sf/openrocket/file/wavefrontobj/export/OBJExporterFactoryTest.java
index f0699ec8b..8a087066c 100644
--- a/core/test/net/sf/openrocket/file/wavefrontobj/export/OBJExporterFactoryTest.java
+++ b/core/test/net/sf/openrocket/file/wavefrontobj/export/OBJExporterFactoryTest.java
@@ -160,22 +160,27 @@ public class OBJExporterFactoryTest {
         Path tempFile = Files.createTempFile("testExport", ".obj");
         String filePath = tempFile.toAbsolutePath().toString();
 
+
+        filePath = "/Users/SiboVanGool/Downloads/testExport.obj";       // TODO: remove this line
+
+
         // Do the exporting
-        CoordTransform transformer = new DefaultCoordTransform(rocket.getLength());
-        OBJExporterFactory exporterFactory = new OBJExporterFactory(components, rocket.getSelectedConfiguration(), true, false, true,
-                transformer, filePath);
+        OBJExportOptions options = new OBJExportOptions(rocket);
+        options.setScaling(30);
+        options.setExportChildren(true);
+        OBJExporterFactory exporterFactory = new OBJExporterFactory(components, rocket.getSelectedConfiguration(), filePath, options);
         exporterFactory.doExport();
 
 
         // Test with other parameters
-        noseCone.setShoulderCapped(false);
+        /*noseCone.setShoulderCapped(false);
         railButton.setScrewHeight(0);
         bodyTube.setFilled(true);
 
         transformer = new DefaultCoordTransform(rocket.getLength());
-        exporterFactory = new OBJExporterFactory(components, rocket.getSelectedConfiguration(), false, false, true,
+        exporterFactory = new OBJExporterFactory(components, rocket.getSelectedConfiguration(), true, false, false,
                 transformer, filePath);
-        exporterFactory.doExport();
+        exporterFactory.doExport();*/
 
         // Clean up
         Files.delete(tempFile);