diff --git a/reconstruction/ai/src/main/java/org/jlab/service/ai/DCDenoiseEngine.java b/reconstruction/ai/src/main/java/org/jlab/service/ai/DCDenoiseEngine.java
index 8187762ba..45e84159b 100644
--- a/reconstruction/ai/src/main/java/org/jlab/service/ai/DCDenoiseEngine.java
+++ b/reconstruction/ai/src/main/java/org/jlab/service/ai/DCDenoiseEngine.java
@@ -11,13 +11,16 @@
 import ai.djl.training.util.ProgressBar;
 import ai.djl.translate.Translator;
 import ai.djl.translate.TranslatorContext;
+import ai.djl.translate.Batchifier;
 import ai.djl.inference.Predictor;
 import ai.djl.repository.zoo.ModelNotFoundException;
-import ai.djl.translate.Batchifier;
 import ai.djl.translate.TranslateException;
+
 import java.io.IOException;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ArrayBlockingQueue;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 
 import org.jlab.clas.reco.ReconstructionEngine;
 import org.jlab.io.base.DataBank;
@@ -27,28 +30,36 @@
 public class DCDenoiseEngine extends ReconstructionEngine {
 
     final static String[] BANK_NAMES = {"DC::tot","DC::tdc"};
-    final static String CONF_THRESHOLD = "threshold";
+    final static String CONF_MODEL_FILE = "modelFile";
+    final static String CONF_THRESHOLD = "threshold";  
     final static String CONF_THREADS = "threads";
+
     final static int LAYERS = 36;
     final static int WIRES = 112;
+    final static int SECTORS= 6;
 
-    float threshold = 0.025f;
-    Criteria<float[][],float[][]> criteria;
-    ZooModel<float[][], float[][]> model;
+    String modelFile = "cnn_autoenc_sector1_2b_48f_4x6k.pt";
+    float threshold = 0.03f;
+    Criteria<float[][][], float[][][]> criteria;
+    ZooModel<float[][][], float[][][]> model;
     PredictorPool predictors;
-    
+
+    // -------- Predictor Pool --------
     public static class PredictorPool {
-        final BlockingQueue<Predictor> pool;
-        public PredictorPool(int size, ZooModel model) {
+        final BlockingQueue<Predictor<float[][][], float[][][]>> pool;
+        public PredictorPool(int size, ZooModel<float[][][], float[][][]> model) {
             pool = new ArrayBlockingQueue<>(size);
-            for (int i=0; i<size; i++) pool.add(model.newPredictor());
-        }
-        public Predictor get() throws InterruptedException {
-            return pool.poll();
-        }
-        public void put(Predictor p) {
-            if (p != null) pool.offer(p);
+            for (int i=0; i<size; i++) {
+                try {
+                    pool.add(model.newPredictor());
+                } catch (Exception e) {
+                    Logger.getLogger(PredictorPool.class.getName()).log(Level.WARNING, "Failed to create predictor", e);
+                }
+            }
         }
+        public Predictor<float[][][], float[][][]> take() throws InterruptedException { return pool.take(); }
+        public void put(Predictor<float[][][], float[][][]> p) throws InterruptedException { if (p!=null) pool.put(p); }
+        public void shutdownAll() { for (Predictor p: pool) { try { p.close(); } catch (Exception ignored) {} } }
     }
 
     public DCDenoiseEngine() {
@@ -62,173 +73,138 @@ public boolean init() {
         System.setProperty("ai.djl.pytorch.graph_optimizer", "false");
         if (getEngineConfigString(CONF_THRESHOLD) != null)
             threshold = Float.parseFloat(getEngineConfigString(CONF_THRESHOLD));
+        if (getEngineConfigString(CONF_MODEL_FILE) != null)
+            modelFile = getEngineConfigString(CONF_MODEL_FILE);
+
         try {
+            String modelPath = ClasUtilsFile.getResourceDir("CLAS12DIR", "etc/data/nnet/dn/" + modelFile);
+
             criteria = Criteria.builder()
-                .setTypes(float[][].class, float[][].class)
-                .optModelPath(Paths.get(ClasUtilsFile.getResourceDir("CLAS12DIR","etc/data/nnet/dn/cnn_autoenc_sector1_nBlocks2.pt")))
+                .setTypes(float[][][].class, float[][][].class)
+                .optModelPath(Paths.get(modelPath))
                 .optEngine("PyTorch")
-                .optTranslator(DCDenoiseEngine.getTranslator())
+                .optTranslator(DCDenoiseEngine.getBatchTranslator())
                 .optProgress(new ProgressBar())
                 .build();
+
             model = criteria.loadModel();
+
             int threads = Integer.parseInt(getEngineConfigString(CONF_THREADS,"64"));
             predictors = new PredictorPool(threads, model);
             return true;
         } catch (NullPointerException | MalformedModelException | IOException | ModelNotFoundException ex) {
-            System.getLogger(DCDenoiseEngine.class.getName()).log(System.Logger.Level.ERROR, (String) null, ex);
+            Logger.getLogger(DCDenoiseEngine.class.getName()).log(Level.SEVERE, null, ex);
             return false;
         }
     }
 
-    public static void main(String args[]){
-        DCDenoiseEngine dn = new DCDenoiseEngine();
-        dn.init();
-        for (int i=0; i<10000; i++) {
-            dn.processFakeEvent();
-        }
-    }
-    
     @Override
     public boolean processDataEvent(DataEvent event) {
+        for (String bankName : BANK_NAMES) {
+            if (!event.hasBank(bankName)) continue;
 
-        //if (true) return processFakeEvent();
-       
-        for (int i=0; i<BANK_NAMES.length; i++){
-            if (event.hasBank(BANK_NAMES[i])) {
-                DataBank bank = event.getBank(BANK_NAMES[i]);
-                try {
-                    // WARNING:  Predictor is *not* thread safe.
-                    Predictor<float[][], float[][]> predictor = predictors.get();
-                    for (int sector=0; sector<6; sector++) {
-                        float[][] input = DCDenoiseEngine.read(bank, sector+1);
-                        float[][] output = predictor.predict(input);
-                        //System.out.println("IN:");show(input);
-                        //System.out.println("OUT:");show(output);
-                        update(bank, threshold, output, sector);
+            DataBank bank = event.getBank(bankName);
+            try {
+                // Build batch for 6 sectors
+                float[][][] batchInput = new float[SECTORS][LAYERS][WIRES];
+                boolean anySectorPresent = false;
+                int rows = bank.rows();
+                for (int r=0; r<rows; r++) {
+                    int sector = bank.getByte(0,r); // 1..6
+                    if (sector < 1 || sector > SECTORS) continue;
+                    int layer = bank.getByte(1,r);
+                    int wire = bank.getShort(2,r);
+                    byte order = bank.getByte(3,r);
+                    if ((order==0)||(order==10)) {
+                        batchInput[sector-1][layer-1][wire-1]=1.0f;
+                        anySectorPresent = true;
                     }
-                    predictors.put(predictor);
-                    event.removeBank(BANK_NAMES[i]);
-                    event.appendBank(bank);
                 }
-                catch (TranslateException | InterruptedException e) {
-                    throw new RuntimeException(e);
-                }
-                break;
-            }
-        }
-        return true;
-    }
 
-    boolean processFakeEvent() {
-        try {
-            Predictor<float[][], float[][]> predictor = model.newPredictor();
-            float[][] input = getAlmostStraightSlightlyBendingTrack();
-            float[][] output = predictor.predict(input);
-            //System.out.println("IN:");show(input);
-            //System.out.println("OUT:");show(output);
-        }
-        catch (TranslateException e) {
-            throw new RuntimeException(e);
-        }
-        return true;
-    }
-    
-    /**
-     * Reject sub-threshold hits by modifying the bank's order variable.
-     * WARNING:  This is not a full implementation of OrderType enum and
-     * all its names, but for now a copy of the subset in C++ DC denoising, see:
-     * https://code.jlab.org/hallb/clas12/coatjava/denoising/-/blob/main/denoising/code/drift.cc?ref_type=heads#L162-198 
-     */
-    static void update(DataBank b, float threshold, float[][] data, int sector) {
-        //System.out.println("IN:");b.show();
-        for (int row=0; row<b.rows(); row++) {
-            if (b.getByte(0,row)-1 != sector) continue;
-            if (data[b.getByte(1,row)-1][b.getShort(2,row)-1] < threshold) {                
-                if(b.getByte(3,row) == 0) b.setByte(3, row, (byte)(60));
-                if(b.getByte(3,row) == 10) b.setByte(3, row, (byte)(90));
-            }
-        }
-        //System.out.println("OUT:");b.show();
-    }
+                if (!anySectorPresent) continue;
 
-    /**
-     * Get one-sector data with weights set to 0/1.
-     */
-    static float[][] read(DataBank bank, int sector) {
-        float[][] data = new float[LAYERS][WIRES];
-        for (int i=0; i<bank.rows(); ++i) {
-            if (bank.getByte(0,i) == sector) {
-                byte o = bank.getByte(3,i);
-                if (0==o || 10==o)
-                    // got a hit, set weight to one:
-                    data[bank.getByte(1,i)-1][bank.getShort(2,i)-1] = 1.0f;
-            }
-        }
-        return data;
-    }
+                Predictor<float[][][], float[][][]> predictor = predictors.take();
+                float[][][] batchOutput;
+                try {
+                    batchOutput = predictor.predict(batchInput);
+                } finally {
+                    predictors.put(predictor);
+                }
 
-    /**
-     * Print all hits for one sector.
-     */
-    static void show(float[][] data) {
-        System.out.println("Shape: [" + data.length + "," + data[0].length + "]");
-        for (int i = 0; i < LAYERS; i++) {
-            for (int j = 0; j < WIRES; j++)
-                System.out.printf("%.3f ", data[i][j]);
-            System.out.println();
-        }
-    }
+                for (int sectorIdx=0; sectorIdx<SECTORS; sectorIdx++) {
+                    update(bank, threshold, batchOutput[sectorIdx], sectorIdx);
+                }
 
-    /**
-     * @return a dummy sector/track 
-     */
-    static float[][] getAlmostStraightSlightlyBendingTrack() {
-        float[][] data = new float[LAYERS][WIRES];
-        for (int y = 0; y < LAYERS; y++) {
-            int x = 50 + (y / 10);
-            data[y][x] = 1.0f;
+                event.removeBank(bankName);
+                event.appendBank(bank);
+            } catch (TranslateException | InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+            break;
         }
-        return data;
+        return true;
     }
 
-    public static Translator<float[][],float[][]> getTranslator() {
-        return new Translator<float[][],float[][]>() {
+    // -------- Translator for batch --------
+    public static Translator<float[][][], float[][][]> getBatchTranslator() {
+        return new Translator<float[][][], float[][][]>() {
             @Override
-            public NDList processInput(TranslatorContext ctx, float[][] input) throws Exception {
+            public NDList processInput(TranslatorContext ctx, float[][][] input) {
+                int batch = input.length;
+                int height = input[0].length;
+                int width = input[0][0].length;
+                float[] flat = new float[batch*height*width];
+                int pos=0;
+                for (int b=0; b<batch; b++)
+                    for (int h=0; h<height; h++) {
+                        System.arraycopy(input[b][h],0,flat,pos,width);
+                        pos+=width;
+                    }
                 NDManager manager = ctx.getNDManager();
-                int height = input.length;
-                int width = input[0].length;
-                float[] flat = new float[height * width];
-                for (int i = 0; i < height; i++) {
-                    System.arraycopy(input[i], 0, flat, i * width, width);
-                }
-                NDArray x = manager.create(flat, new Shape(height, width));
-                // Add batch and channel dims -> [1,1,36,112]
-                x = x.expandDims(0).expandDims(0);
+                NDArray x = manager.create(flat, new Shape(batch,1,height,width));
                 return new NDList(x);
             }
+
             @Override
-            public float[][] processOutput(TranslatorContext ctx, NDList list) throws Exception {
+            public float[][][] processOutput(TranslatorContext ctx, NDList list) {
                 NDArray result = list.get(0);
-                // Remove batch and channel dims -> [36,112]
-                result = result.squeeze();
-                // Convert to 1D float array
-                float[] flat = result.toFloatArray();
-                // Reshape manually into 2D array
                 long[] shape = result.getShape().getShape();
-                int height = (int) shape[0];
-                int width = (int) shape[1];
-                float[][] output2d = new float[height][width];
-                for (int i = 0; i < height; i++) {
-                    System.arraycopy(flat, i * width, output2d[i], 0, width);
-                }
-                return output2d;
+                int batch = (int)shape[0];
+                int height, width;
+                if (shape.length==4 && shape[1]==1) {
+                    height=(int)shape[2]; width=(int)shape[3];
+                    result = result.squeeze(1);
+                } else if (shape.length==3) {
+                    height=(int)shape[1]; width=(int)shape[2];
+                } else throw new IllegalStateException("Unexpected output shape: "+java.util.Arrays.toString(shape));
+                float[] flat = result.toFloatArray();
+                float[][][] out = new float[batch][height][width];
+                int pos=0;
+                for (int b=0;b<batch;b++)
+                    for (int h=0;h<height;h++) {
+                        System.arraycopy(flat,pos,out[b][h],0,width);
+                        pos+=width;
+                    }
+                return out;
             }
+
             @Override
-            public Batchifier getBatchifier() {
-                return null; // no batching
-            }
+            public Batchifier getBatchifier() { return null; }
         };
     }
 
+    // -------- Update single sector in bank --------
+    static void update(DataBank b, float threshold, float[][] data, int sectorIdx) {
+        for (int row=0; row<b.rows(); row++) {
+            if (b.getByte(0,row)-1 != sectorIdx) continue;
+            int layer=b.getByte(1,row)-1;
+            int wire=b.getShort(2,row)-1;
+            if (layer<0 || layer>=data.length) continue;
+            if (wire<0 || wire>=data[0].length) continue;
+            if (data[layer][wire]<threshold) {
+                if(b.getByte(3,row)==0) b.setByte(3,row,(byte)60);
+                if(b.getByte(3,row)==10) b.setByte(3,row,(byte)90);
+            }
+        }
+    }
 }