diff --git a/arccnet/data_generation/mag_processing.py b/arccnet/data_generation/mag_processing.py
index d77d50c6..59e37327 100644
--- a/arccnet/data_generation/mag_processing.py
+++ b/arccnet/data_generation/mag_processing.py
@@ -620,13 +620,15 @@ def _validregion_extraction(self, group, mag_map, cont_map, cutout_size, path) -
 
             mag_submap = mag_map.submap(bottom_left, top_right=top_right)
             cont_submap = cont_map.submap(bottom_left, top_right=top_right)
+            det = mag_submap.detector if mag_submap.detector != "" else mag_submap.instrument
             output_mag_filename = (
                 path / f"{mag_submap.date.to_datetime().strftime('%Y%m%d_%H%M%S')}_{row['id']}-{row['number']}_"
-                f"mag_{mag_submap.detector.replace(' ', '_')}.fits"
+                f"mag_{det.replace(' ', '_')}.fits"
             )
+            det = cont_submap.detector if cont_submap.detector != "" else cont_submap.instrument
             output_cont_filename = (
                 path / f"{cont_submap.date.to_datetime().strftime('%Y%m%d_%H%M%S')}_{row['id']}-{row['number']}_"
-                f"cont_{cont_submap.detector.replace(' ', '_')}.fits"
+                f"cont_{det.replace(' ', '_')}.fits"
             )
 
             # store info in ARBox
@@ -748,14 +750,16 @@ def _quietsun_extraction(
                 bottom_left, top_right = pixel_to_bboxcoords(xsize, ysize, qs_center_hproj * u.pix)
                 qs_mag_submap = mag_map.submap(bottom_left, top_right=top_right)
                 # save to file
+                det = qs_mag_submap.detector if qs_mag_submap.detector != "" else qs_mag_submap.instrument
                 output_mag_filename = (
                     path / f"{qs_mag_submap.date.to_datetime().strftime('%Y%m%d_%H%M%S')}_QS-{qs_df_len}_"
-                    f"mag_{qs_mag_submap.detector.replace(' ', '_')}.fits"
+                    f"mag_{det.replace(' ', '_')}.fits"
                 )
-                qs_cont_submap = cont_map.submap(bottom_left, top_right=bottom_left)
+                qs_cont_submap = cont_map.submap(bottom_left, top_right=top_right)
+                det = qs_cont_submap.detector if qs_cont_submap.detector != "" else qs_cont_submap.instrument
                 output_cont_filename = (
                     path / f"{qs_cont_submap.date.to_datetime().strftime('%Y%m%d_%H%M%S')}_QS-{qs_df_len}_"
-                    f"cont_{qs_cont_submap.detector.replace(' ', '_')}.fits"
+                    f"cont_{det.replace(' ', '_')}.fits"
                 )
 
                 # create QS BBox object
diff --git a/arccnet/data_generation/utils/utils.py b/arccnet/data_generation/utils/utils.py
index a92cfec6..003677d9 100644
--- a/arccnet/data_generation/utils/utils.py
+++ b/arccnet/data_generation/utils/utils.py
@@ -7,6 +7,8 @@
 from pandas.core.interchange.dataframe_protocol import DataFrame
 from sklearn.model_selection import StratifiedGroupKFold
 
+from astropy.io.fits import CompImageHDU
+
 from arccnet.utils.logging import logger
 
 __all__ = [
@@ -55,7 +57,7 @@ def save_compressed_map(amap: sunpy.map.Map, path: Path, **kwargs) -> None:
     if "bzero" in amap.meta:
         del amap.meta["bzero"]
 
-    amap.save(path, **kwargs)  # , hdu_type=astropy.io.fits.CompImageHDU, **kwargs)
+    amap.save(path, hdu_type=CompImageHDU, **kwargs)
 
 
 def round_to_midnight(dt: datetime):
diff --git a/arccnet/pipeline/main.py b/arccnet/pipeline/main.py
index 91366b2d..2df5a10c 100644
--- a/arccnet/pipeline/main.py
+++ b/arccnet/pipeline/main.py
@@ -776,7 +776,7 @@ def region_cutouts(config, srs_hmi, srs_mdi):
         logger.debug(f"writing {hmi_file}")
         hmi_table.write(hmi_file, format="parquet", overwrite=True)
 
-    mdi_file = intermediate_files / "mdi_rcutout_classification.parq"
+    mdi_file = intermediate_files / "mdi_cutout_classification.parq"
     if mdi_file.exists():
         mdi_table = QTable.read(mdi_file)
     else: