diff --git a/clust/beam_En700eV_-40deg_300V_10us_d0_f0_100.pkl b/clust/beam_En700eV_-40deg_300V_10us_d0_f0_100.pkl
new file mode 100644
index 0000000..095c8d3
Binary files /dev/null and b/clust/beam_En700eV_-40deg_300V_10us_d0_f0_100.pkl differ
diff --git a/clust/make_hists.py b/clust/make_hists.py
new file mode 100644
index 0000000..6e55f0a
--- /dev/null
+++ b/clust/make_hists.py
@@ -0,0 +1,38 @@
+import numpy as np
+import time
+from pathlib import Path
+import pickle
+
+import boost_histogram as bh
+
+
+n_bins = 100
+xmin = -100
+xmax = 1e4
+
+
+#Python implementation to read a cluster file and save the 
+#histogram. Can be used to compare with the C++ implementation.
+
+fname = Path('beam_En700eV_-40deg_300V_10us_d0_f0_100.clust')
+
+hist_py = bh.Histogram(bh.axis.Regular(n_bins, xmin, xmax))
+
+t0 = time.perf_counter()
+N = 1500 #Maximum frames
+with open(fname, 'rb') as f:
+    for i in range(N):
+        frame_number = np.fromfile(f, count=1, dtype = np.int32)
+        if frame_number.size == 0:
+            break
+        n_clusters = np.fromfile(f, count=1, dtype = np.uint32)[0]
+        for i in range(n_clusters):
+            xy = np.fromfile(f, count=2, dtype = np.uint16)
+            data = np.fromfile(f, count=9, dtype = np.int32)
+            hist_py.fill(data)
+t = time.perf_counter()-t0
+
+with open(fname.with_suffix('.pkl'), 'wb') as f:
+    pickle.dump(hist_py, f)
+
+print(f'Reading {i} frames with python took: {t:.3f}s')
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diff --git a/raw/moench03/copy_frames.py b/raw/moench03/copy_frames.py
new file mode 100644
index 0000000..3087a0a
--- /dev/null
+++ b/raw/moench03/copy_frames.py
@@ -0,0 +1,40 @@
+from pathlib import Path
+
+
+header_size = 112
+frame_size = 400**2*2
+
+n_frames = 1000
+
+
+# base = Path('/mnt/sls_det_storage/matterhorn_data/aare_test_data/')
+# f = File(base/'Moench03new/cu_half_speed_master_4.json')
+findex = 4
+for base_name in ['cu_half_speed',]:
+
+    src = Path(f'/mnt/sls_det_storage/matterhorn_data/aare_test_data/Moench03new/{base_name}_d0_f0_{findex}.raw')
+    dst = Path('/home/l_msdetect/erik/data/aare-test-data/raw/moench03')/src.name
+
+    print(f'src: {src}')
+    print(f'dst: {dst}')
+
+    # Copy data
+    with open(src, 'rb') as fsrc, open(dst, 'wb') as fdst:
+        for i in range(n_frames):
+            data = fsrc.read(header_size+frame_size)
+            fdst.write(data)
+
+    # Copy master file and rewrite the number of frames in the file
+    msrc = src.parent/f'{base_name}_master_{findex}.json'
+    mdst = dst.parent/f'{base_name}_master_{findex}.json'
+
+    print(f'msrc: {msrc}')
+    print(f'mdst: {mdst}')
+
+    with open(msrc) as m_fsrc, open(mdst, 'w') as m_fdst:
+        for line in m_fsrc:
+            if "Total Frames" in line:
+                line = f'\t"Total Frames": {n_frames},\n'
+            if "Frames in File" in line:
+                line = f'\t"Frames in File": {n_frames},\n'
+            m_fdst.write(line)
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diff --git a/raw/moench03/cu_half_speed_d0_f0_4.raw b/raw/moench03/cu_half_speed_d0_f0_4.raw
new file mode 100644
index 0000000..4153c78
Binary files /dev/null and b/raw/moench03/cu_half_speed_d0_f0_4.raw differ
diff --git a/raw/moench03/cu_half_speed_master_4.json b/raw/moench03/cu_half_speed_master_4.json
new file mode 100644
index 0000000..4790458
--- /dev/null
+++ b/raw/moench03/cu_half_speed_master_4.json
@@ -0,0 +1,48 @@
+{
+    "Version": 7.1,
+    "Timestamp": "Fri Jul 14 15:29:01 2023",
+    "Detector Type": "Moench",
+    "Timing Mode": "auto",
+    "Geometry": {
+        "x": 1,
+        "y": 1
+    },
+    "Image Size in bytes": 320000,
+    "Pixels": {
+        "x": 400,
+        "y": 400
+    },
+    "Max Frames Per File": 10000,
+    "Frame Discard Policy": "discardpartial",
+    "Frame Padding": 1,
+    "Scan Parameters": "[disabled]",
+	"Total Frames": 1000,
+    "Receiver Roi": {
+        "xmin": 4294967295,
+        "xmax": 4294967295,
+        "ymin": 4294967295,
+        "ymax": 4294967295
+    },
+    "Exptime": "1ms",
+    "Period": "600us",
+    "Number of UDP Interfaces": 1,
+    "Number of rows": 400,
+    "Additional Json Header": "{detectorMode: counting, frameMode: frame}",
+	"Frames in File": 1000,
+    "Frame Header Format": {
+        "Frame Number": "8 bytes",
+        "SubFrame Number/ExpLength": "4 bytes",
+        "Packet Number": "4 bytes",
+        "Bunch ID": "8 bytes",
+        "Timestamp": "8 bytes",
+        "Module Id": "2 bytes",
+        "Row": "2 bytes",
+        "Column": "2 bytes",
+        "Reserved": "2 bytes",
+        "Debug": "4 bytes",
+        "Round Robin Number": "2 bytes",
+        "Detector Type": "1 byte",
+        "Header Version": "1 byte",
+        "Packets Caught Mask": "64 bytes"
+    }
+}
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