diff --git a/java_tools/ConfigDefinition.jar b/java_tools/ConfigDefinition.jar
index ec41495579..9617102ba5 100644
Binary files a/java_tools/ConfigDefinition.jar and b/java_tools/ConfigDefinition.jar differ
diff --git a/java_tools/configuration_definition/src/main/java/com/rusefi/output/ConfigStructure.java b/java_tools/configuration_definition/src/main/java/com/rusefi/output/ConfigStructure.java
index 3e5b23d294..15a9ed6416 100644
--- a/java_tools/configuration_definition/src/main/java/com/rusefi/output/ConfigStructure.java
+++ b/java_tools/configuration_definition/src/main/java/com/rusefi/output/ConfigStructure.java
@@ -58,12 +58,14 @@ public class ConfigStructure {
          * we make alignment decision based on C fields since we expect iteration and non-iteration fields
          * to match in size
          */
-        FieldIteratorWithOffset iterator = new FieldIteratorWithOffset(cFields);
-        for (int i = 0; i < cFields.size(); i++) {
-            iterator.start(i);
-            iterator.end();
-            iterator.currentOffset += iterator.cf.getSize(iterator.next);
-        }
+        FieldIteratorWithOffset iterator = new FieldIteratorWithOffset(cFields) {
+            @Override
+            public void end() {
+                super.end();
+                currentOffset += cf.getSize(next);
+            }
+        };
+        iterator.loop();
 
         totalSize = iterator.currentOffset;
         int fillSize = totalSize % 4 == 0 ? 0 : 4 - (totalSize % 4);
diff --git a/java_tools/configuration_definition/src/main/java/com/rusefi/output/DataLogConsumer.java b/java_tools/configuration_definition/src/main/java/com/rusefi/output/DataLogConsumer.java
index f3b4e89ab3..734c94acd8 100644
--- a/java_tools/configuration_definition/src/main/java/com/rusefi/output/DataLogConsumer.java
+++ b/java_tools/configuration_definition/src/main/java/com/rusefi/output/DataLogConsumer.java
@@ -9,6 +9,7 @@ import org.jetbrains.annotations.NotNull;
 import java.io.CharArrayWriter;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.util.List;
 import java.util.TreeSet;
 
 import static com.rusefi.ConfigField.unquote;
@@ -40,8 +41,9 @@ public class DataLogConsumer implements ConfigurationConsumer {
     @Override
     public void handleEndStruct(ConfigStructure structure) throws IOException {
         if (state.stack.isEmpty()) {
-            FieldIterator iterator = new FieldIterator(structure.tsFields);
-            String content = handleFields(structure, iterator, "");
+            DataLogFieldIterator iterator = new DataLogFieldIterator(structure.tsFields, "");
+            iterator.loop();
+            String content = iterator.sb.toString();
             tsWriter.append(content);
         }
 
@@ -52,17 +54,21 @@ public class DataLogConsumer implements ConfigurationConsumer {
         }
     }
 
-    private String handleFields(ConfigStructure structure, FieldIterator iterator, String prefix) {
+    class DataLogFieldIterator extends FieldIterator {
+        private final String prefix;
         StringBuilder sb = new StringBuilder();
-        for (int i = 0; i < structure.tsFields.size(); i++) {
-            iterator.start(i);
-
-            String content = handle(iterator.cf, prefix);
-            sb.append(content);
-            iterator.end();
 
+        public DataLogFieldIterator(List<ConfigField> fields, String prefix) {
+            super(fields);
+            this.prefix = prefix;
+        }
+
+        @Override
+        public void end() {
+            String content = handle(cf, prefix);
+            sb.append(content);
+            super.end();
         }
-        return sb.toString();
     }
 
     private String handle(ConfigField configField, String prefix) {
@@ -72,7 +78,9 @@ public class DataLogConsumer implements ConfigurationConsumer {
         ConfigStructure cs = configField.getState().structures.get(configField.getType());
         if (cs != null) {
             String extraPrefix = cs.withPrefix ? configField.getName() + "_" : "";
-            return handleFields(cs, new FieldIterator(cs.tsFields), extraPrefix);
+            DataLogFieldIterator fieldIterator = new DataLogFieldIterator(cs.tsFields, extraPrefix);
+            fieldIterator.loop();
+            return fieldIterator.sb.toString();
         }
 
 
diff --git a/java_tools/configuration_definition/src/main/java/com/rusefi/output/FieldIterator.java b/java_tools/configuration_definition/src/main/java/com/rusefi/output/FieldIterator.java
index 1fe5a175ec..2899c0c6e3 100644
--- a/java_tools/configuration_definition/src/main/java/com/rusefi/output/FieldIterator.java
+++ b/java_tools/configuration_definition/src/main/java/com/rusefi/output/FieldIterator.java
@@ -9,14 +9,14 @@ import java.util.List;
  * custom iterator with references to previous and next elements
  */
 public class FieldIterator {
-    private final List<ConfigField> tsFields;
+    private final List<ConfigField> fields;
     BitState bitState = new BitState();
     private ConfigField prev = ConfigField.VOID;
     ConfigField next;
     ConfigField cf;
 
-    public FieldIterator(List<ConfigField> tsFields) {
-        this.tsFields = tsFields;
+    public FieldIterator(List<ConfigField> fields) {
+        this.fields = fields;
     }
 
     /**
@@ -28,11 +28,18 @@ public class FieldIterator {
 
     public void start(int index) {
         int nextIndex = index + 1;
-        while (nextIndex < tsFields.size() && tsFields.get(nextIndex).isDirective())
+        while (nextIndex < fields.size() && fields.get(nextIndex).isDirective())
             nextIndex++;
 
-        next = nextIndex >= tsFields.size() ? ConfigField.VOID : tsFields.get(nextIndex);
-        cf = tsFields.get(index);
+        next = nextIndex >= fields.size() ? ConfigField.VOID : fields.get(nextIndex);
+        cf = fields.get(index);
+    }
+
+    public void loop() {
+        for (int i = 0; i < fields.size(); i++) {
+            start(i);
+            end();
+        }
     }
 
     public void end() {