diff --git a/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/AbstractUnitXCGroupBuilder.java b/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/AbstractUnitXCGroupBuilder.java
index 4436bd6..1b73522 100644
--- a/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/AbstractUnitXCGroupBuilder.java
+++ b/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/AbstractUnitXCGroupBuilder.java
@@ -55,7 +55,7 @@ abstract public class AbstractUnitXCGroupBuilder<P,T extends AbstractUnitXCGroup
 	}
 	
 	public B addQuantityId(String id) {
-		return make((v) -> v.addQuantity(new DefaultUnitXCGroupQuantity(null,"group."+v.getId()+".quantity",id)));
+		return make((v) -> v.addQuantity(new DefaultUnitXCGroupQuantity(null,"group."+v.getId()+".quantity",id)));  // TODO: fix null bundle here
 	}
 	
 	public B addQuantityIds(String...ids) {
diff --git a/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/UnitXCConfigBuilder.java b/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/UnitXCConfigBuilder.java
index 05ed1da..1f66a74 100644
--- a/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/UnitXCConfigBuilder.java
+++ b/unitxc-converter/src/main/java/net/forwardfire/unitxc/config/builder/UnitXCConfigBuilder.java
@@ -23,7 +23,6 @@
 
 package net.forwardfire.unitxc.config.builder;
 
-import java.util.Collections;
 import java.util.Locale;
 import java.util.ResourceBundle;
 
@@ -45,7 +44,7 @@ import net.forwardfire.unitxc.model.UnitXCResourceBundle;
  */
 public class UnitXCConfigBuilder {
 
-	public static final String TYPE_FLAG_IMPERIAL       = "IMPERIAL"; // todo move to ...
+	public static final String TYPE_FLAG_IMPERIAL       = "IMPERIAL"; // TODO: move to ...
 	public static final String TYPE_FLAG_IMPERIAL_EXTRA = "IMPERIAL_EXTRA";
 	public static final String TYPE_FLAG_ALIAS          = "ALIAS";
 	
diff --git a/unitxc-converter/src/test/java/net/forwardfire/unitxc/UnitXCConverterStepTest.java b/unitxc-converter/src/test/java/net/forwardfire/unitxc/UnitXCConverterStepTest.java
index 3f7942f..d2d8ab5 100644
--- a/unitxc-converter/src/test/java/net/forwardfire/unitxc/UnitXCConverterStepTest.java
+++ b/unitxc-converter/src/test/java/net/forwardfire/unitxc/UnitXCConverterStepTest.java
@@ -129,9 +129,10 @@ public class UnitXCConverterStepTest {
 		result = unitManager.getConverter().convertStepped(50, "km/h", "mm",para);
 		//System.out.println("CONVERT-RESULT: "+result);
 		
-		int x=0;
+		long totalUnits=0;
 		StringBuilder buf = new StringBuilder();
 		buf.append("digraph G {\n");
+		
 		//buf.append("\tsize = \"4,4\"\n");
 		for (UnitXCGroup typeGroup:unitManager.getConfig().getUnitGroups()) {
 			UnitXCType baseType = unitManager.getUnitType(typeGroup.getBaseTypeId());
@@ -170,6 +171,8 @@ public class UnitXCConverterStepTest {
 			buf.append("color=red,label=\""+typeGroup.getUnitTypeSize()+"\"");
 			buf.append("];\n");
 			
+			totalUnits += typeGroup.getUnitTypeSize();
+			
 			// print relations
 			for (String groupFrom:typeGroup.getDerivedFrom()) {
 				buf.append("\t"+groupFrom+" -> "+typeGroup.getId());
@@ -202,6 +205,9 @@ public class UnitXCConverterStepTest {
 				//}
 			//}
 		}
+		
+		buf.append("Stats[shape=box,color=\".9 0.2 0.8\",label=\"unit groups: "+unitManager.getConfig().getUnitGroups().size()+"\\ntotal units: "+totalUnits+"\",labelloc=b];\n");
+		
 		buf.append("}\n");
 		System.out.println("dot: \n"+buf.toString());
 		FileUtils.write(new File("target/groups.dot"), buf.toString(), Charset.forName("UTF-8"), false);