diff --git a/src/murfey/cli/transfer.py b/src/murfey/cli/transfer.py
index f8a8b7eb1..3c03c8e05 100644
--- a/src/murfey/cli/transfer.py
+++ b/src/murfey/cli/transfer.py
@@ -36,10 +36,8 @@ def run():
     murfey_url = urlparse(args.server, allow_fragments=False)
 
     machine_data = requests.get(f"{murfey_url.geturl()}/machine").json()
-    if Path(args.source or ".").resolve() in machine_data.data_directories.keys():
-        console.print(
-            f"[red]Source directory is the base directory for the {machine_data.data_directories[Path(args.source or '.').resolve()]}, exiting"
-        )
+    if Path(args.source or ".").resolve() in machine_data.data_directories:
+        console.print("[red]Source directory is the base directory, exiting")
         return
 
     cmd = [
diff --git a/src/murfey/client/__init__.py b/src/murfey/client/__init__.py
index b72b26078..4cc6b7108 100644
--- a/src/murfey/client/__init__.py
+++ b/src/murfey/client/__init__.py
@@ -215,12 +215,6 @@ def run():
         default=False,
         help="Remove source files immediately after their transfer",
     )
-    parser.add_argument(
-        "--relax",
-        action="store_true",
-        default=False,
-        help="Relax the condition that the source directory needs to be recognised from the configuration",
-    )
     parser.add_argument(
         "--name",
         type=str,
@@ -344,7 +338,6 @@ def run():
         gain_ref=gain_ref,
         redirected_logger=rich_handler,
         force_mdoc_metadata=not args.ignore_mdoc_metadata,
-        strict=not args.relax,
         processing_enabled=machine_data.get("processing_enabled", True),
         skip_existing_processing=args.skip_existing_processing,
     )
diff --git a/src/murfey/client/analyser.py b/src/murfey/client/analyser.py
index 5ae587a00..c18b06fe4 100644
--- a/src/murfey/client/analyser.py
+++ b/src/murfey/client/analyser.py
@@ -57,7 +57,6 @@ def __init__(
         self._limited = limited
         self._experiment_type = ""
         self._acquisition_software = ""
-        self._role = ""
         self._extension: str = ""
         self._unseen_xml: list = []
         self._context: Context | None = None
@@ -126,14 +125,12 @@ def _find_context(self, file_path: Path) -> bool:
         in the Context classes themselves.
         """
         if "atlas" in file_path.parts:
-            self._role = "detector"
             self._context = SPAMetadataContext("epu", self._basepath)
             return True
 
         # CLEM workflow checks
         # Look for LIF and XLIF files
         if file_path.suffix in (".lif", ".xlif"):
-            self._role = "detector"
             self._context = CLEMContext("leica", self._basepath)
             return True
         # Look for TIFF files associated with CLEM workflow
@@ -152,7 +149,6 @@ def _find_context(self, file_path: Path) -> bool:
                 ).get("analyse_created_directories", [])
             )
             if created_directories.intersection(set(file_path.parts)):
-                self._role = "detector"
                 self._context = CLEMContext("leica", self._basepath)
                 return True
 
@@ -181,9 +177,6 @@ def _find_context(self, file_path: Path) -> bool:
                         else SPAContext("epu", self._basepath)
                     )
                 self.parameters_model = ProcessingParametersSPA
-                # Assign it the detector attribute if not already present
-                if not self._role:
-                    self._role = "detector"
                 return True
 
             # Files starting with "Position" belong to the standard tomography workflow
@@ -198,23 +191,6 @@ def _find_context(self, file_path: Path) -> bool:
                     logger.info("Acquisition software: tomo")
                     self._context = TomographyContext("tomo", self._basepath)
                     self.parameters_model = PreprocessingParametersTomo
-                # Assign role if not already present
-                if not self._role:
-                    # Fractions files attributed to the detector
-                    if (
-                        "Fractions" in split_file_name[-1]
-                        or "fractions" in split_file_name[-1]
-                    ):
-                        self._role = "detector"
-                    # MDOC files attributed to the microscope
-                    elif (
-                        file_path.suffix == ".mdoc"
-                        or file_path.with_suffix(".mdoc").is_file()
-                    ):
-                        self._role = "microscope"
-                    # Attribute all other files to the detector
-                    else:
-                        self._role = "detector"
                 return True
 
             # Files with these suffixes belong to the serial EM tomography workflow
@@ -239,11 +215,6 @@ def _find_context(self, file_path: Path) -> bool:
                     return False
                 self._context = TomographyContext("serialem", self._basepath)
                 self.parameters_model = PreprocessingParametersTomo
-                if not self._role:
-                    if "Frames" in file_path.parts:
-                        self._role = "detector"
-                    else:
-                        self._role = "microscope"
                 return True
         return False
 
@@ -251,7 +222,7 @@ def post_transfer(self, transferred_file: Path):
         try:
             if self._context:
                 self._context.post_transfer(
-                    transferred_file, role=self._role, environment=self._environment
+                    transferred_file, environment=self._environment
                 )
         except Exception as e:
             logger.error(f"An exception was encountered post transfer: {e}")
@@ -309,19 +280,17 @@ def _analyse(self):
                         self.queue.task_done()
                         continue
                     elif self._extension:
-                        logger.info(f"Context found successfully: {self._role}")
+                        logger.info(
+                            f"Context found successfully for {transferred_file}"
+                        )
                         try:
                             self._context.post_first_transfer(
                                 transferred_file,
-                                role=self._role,
                                 environment=self._environment,
                             )
                         except Exception as e:
                             logger.error(f"Exception encountered: {e}")
-                        if (
-                            self._role == "detector"
-                            and "atlas" not in transferred_file.parts
-                        ):
+                        if "atlas" not in transferred_file.parts:
                             if not dc_metadata:
                                 try:
                                     dc_metadata = self._context.gather_metadata(
@@ -377,20 +346,16 @@ def _analyse(self):
                     self._find_extension(transferred_file)
                     if self._extension:
                         logger.info(
-                            f"Context found successfully: {self._role}, {transferred_file}"
+                            f"Extension found successfully for {transferred_file}"
                         )
                         try:
                             self._context.post_first_transfer(
                                 transferred_file,
-                                role=self._role,
                                 environment=self._environment,
                             )
                         except Exception as e:
                             logger.error(f"Exception encountered: {e}")
-                        if (
-                            self._role == "detector"
-                            and "atlas" not in transferred_file.parts
-                        ):
+                        if "atlas" not in transferred_file.parts:
                             if not dc_metadata:
                                 try:
                                     dc_metadata = self._context.gather_metadata(
@@ -443,8 +408,8 @@ def _xml_file(self, data_file: Path) -> Path:
         if not self._environment:
             return data_file.with_suffix(".xml")
         file_name = f"{'_'.join(p for p in data_file.stem.split('_')[:-1])}.xml"
-        data_directories = self._murfey_config.get("data_directories", {})
-        for dd in data_directories.keys():
+        data_directories = self._murfey_config.get("data_directories", [])
+        for dd in data_directories:
             if str(data_file).startswith(dd):
                 base_dir = Path(dd)
                 mid_dir = data_file.relative_to(dd).parent
diff --git a/src/murfey/client/context.py b/src/murfey/client/context.py
index 5230a89bb..7077ab861 100644
--- a/src/murfey/client/context.py
+++ b/src/murfey/client/context.py
@@ -40,14 +40,24 @@ def __init__(self, name: str, acquisition_software: str):
         self._acquisition_software = acquisition_software
         self.name = name
 
-    def post_transfer(self, transferred_file: Path, role: str = "", **kwargs):
+    def post_transfer(
+        self,
+        transferred_file: Path,
+        environment: MurfeyInstanceEnvironment | None = None,
+        **kwargs,
+    ):
         # Search external packages for additional hooks to include in Murfey
         for h in entry_points(group="murfey.post_transfer_hooks"):
             if h.name == self.name:
-                h.load()(transferred_file, role=role, **kwargs)
+                h.load()(transferred_file, environment=environment, **kwargs)
 
-    def post_first_transfer(self, transferred_file: Path, role: str = "", **kwargs):
-        self.post_transfer(transferred_file, role=role, **kwargs)
+    def post_first_transfer(
+        self,
+        transferred_file: Path,
+        environment: MurfeyInstanceEnvironment | None = None,
+        **kwargs,
+    ):
+        self.post_transfer(transferred_file, environment=environment, **kwargs)
 
     def gather_metadata(
         self, metadata_file: Path, environment: MurfeyInstanceEnvironment | None = None
diff --git a/src/murfey/client/contexts/clem.py b/src/murfey/client/contexts/clem.py
index 8cae42469..72f8f54b9 100644
--- a/src/murfey/client/contexts/clem.py
+++ b/src/murfey/client/contexts/clem.py
@@ -101,14 +101,11 @@ def __init__(self, acquisition_software: str, basepath: Path):
     def post_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: Optional[MurfeyInstanceEnvironment] = None,
         **kwargs,
     ) -> bool:
 
-        super().post_transfer(
-            transferred_file, role=role, environment=environment, **kwargs
-        )
+        super().post_transfer(transferred_file, environment=environment, **kwargs)
 
         # Process files generated by "auto-save" acquisition mode
         # These include TIF/TIFF and XLIF files
diff --git a/src/murfey/client/contexts/fib.py b/src/murfey/client/contexts/fib.py
index c0ea3723d..12afdb6a7 100644
--- a/src/murfey/client/contexts/fib.py
+++ b/src/murfey/client/contexts/fib.py
@@ -44,13 +44,10 @@ def __init__(self, acquisition_software: str, basepath: Path):
     def post_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: MurfeyInstanceEnvironment | None = None,
         **kwargs,
     ):
-        super().post_transfer(
-            transferred_file, role=role, environment=environment, **kwargs
-        )
+        super().post_transfer(transferred_file, environment=environment, **kwargs)
         if self._acquisition_software == "autotem":
             parts = transferred_file.parts
             if "DCImages" in parts and transferred_file.suffix == ".png":
diff --git a/src/murfey/client/contexts/spa.py b/src/murfey/client/contexts/spa.py
index 29e139497..7f3b00bd6 100644
--- a/src/murfey/client/contexts/spa.py
+++ b/src/murfey/client/contexts/spa.py
@@ -136,9 +136,9 @@ def _foil_hole_from_file(f: Path) -> int:
 
 
 def _grid_square_metadata_file(
-    f: Path, data_directories: Dict[Path, str], visit: str, grid_square: int
+    f: Path, data_directories: List[Path], visit: str, grid_square: int
 ) -> Path:
-    for dd in data_directories.keys():
+    for dd in data_directories:
         if str(f).startswith(str(dd)):
             base_dir = dd
             mid_dir = f.relative_to(dd).parent
@@ -542,7 +542,7 @@ def _position_analysis(
         grid_square = _grid_square_from_file(transferred_file)
         grid_square_metadata_file = _grid_square_metadata_file(
             transferred_file,
-            {Path(d): l for d, l in machine_config["data_directories"].items()},
+            machine_config["data_directories"],
             environment.visit,
             grid_square,
         )
@@ -669,18 +669,16 @@ def _position_analysis(
     def post_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: MurfeyInstanceEnvironment | None = None,
         **kwargs,
     ) -> bool:
         super().post_transfer(
             transferred_file=transferred_file,
-            role=role,
             environment=environment,
             **kwargs,
         )
         data_suffixes = (".mrc", ".tiff", ".tif", ".eer")
-        if role == "detector" and "gain" not in transferred_file.name:
+        if "gain" not in transferred_file.name:
             if transferred_file.suffix in data_suffixes:
                 if self._acquisition_software == "epu":
                     if environment:
@@ -856,7 +854,6 @@ def _register_data_collection(
     def post_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: MurfeyInstanceEnvironment | None = None,
         **kwargs,
     ) -> bool:
diff --git a/src/murfey/client/contexts/spa_metadata.py b/src/murfey/client/contexts/spa_metadata.py
index 4588df86a..83766d30d 100644
--- a/src/murfey/client/contexts/spa_metadata.py
+++ b/src/murfey/client/contexts/spa_metadata.py
@@ -43,13 +43,11 @@ def __init__(self, acquisition_software: str, basepath: Path):
     def post_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: Optional[MurfeyInstanceEnvironment] = None,
         **kwargs,
     ):
         super().post_transfer(
             transferred_file=transferred_file,
-            role=role,
             environment=environment,
             **kwargs,
         )
diff --git a/src/murfey/client/contexts/tomo.py b/src/murfey/client/contexts/tomo.py
index 54b3f7b34..a17c81712 100644
--- a/src/murfey/client/contexts/tomo.py
+++ b/src/murfey/client/contexts/tomo.py
@@ -549,20 +549,19 @@ def _extract_tilt_series(p: Path) -> str:
     def post_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: MurfeyInstanceEnvironment | None = None,
         **kwargs,
     ) -> List[str]:
         super().post_transfer(
             transferred_file=transferred_file,
-            role=role,
             environment=environment,
             **kwargs,
         )
 
         data_suffixes = (".mrc", ".tiff", ".tif", ".eer")
         completed_tilts = []
-        if role == "detector" and "gain" not in transferred_file.name:
+
+        if "gain" not in transferred_file.name:
             if transferred_file.suffix in data_suffixes:
                 if self._acquisition_software == "tomo":
                     if environment:
@@ -632,13 +631,10 @@ def post_transfer(
     def post_first_transfer(
         self,
         transferred_file: Path,
-        role: str = "",
         environment: MurfeyInstanceEnvironment | None = None,
         **kwargs,
     ):
-        self.post_transfer(
-            transferred_file, role=role, environment=environment, **kwargs
-        )
+        self.post_transfer(transferred_file, environment=environment, **kwargs)
 
     def gather_metadata(
         self, metadata_file: Path, environment: MurfeyInstanceEnvironment | None = None
diff --git a/src/murfey/client/multigrid_control.py b/src/murfey/client/multigrid_control.py
index 4216f4d11..7affd38bc 100644
--- a/src/murfey/client/multigrid_control.py
+++ b/src/murfey/client/multigrid_control.py
@@ -257,13 +257,6 @@ def rsync_result(update: RSyncerUpdate):
                 force_mdoc_metadata=self.force_mdoc_metadata,
                 limited=limited,
             )
-            for data_dir in self._machine_config["data_directories"].keys():
-                if source.resolve().is_relative_to(Path(data_dir)):
-                    self.analysers[source]._role = self._machine_config[
-                        "data_directories"
-                    ][data_dir]
-                    log.info(f"role found for {source}")
-                    break
             if force_metadata:
                 self.analysers[source].subscribe(
                     partial(self._start_dc, from_form=True)
diff --git a/src/murfey/client/tui/app.py b/src/murfey/client/tui/app.py
index 505889f65..4a7195871 100644
--- a/src/murfey/client/tui/app.py
+++ b/src/murfey/client/tui/app.py
@@ -74,7 +74,6 @@ def __init__(
         gain_ref: Path | None = None,
         redirected_logger=None,
         force_mdoc_metadata: bool = False,
-        strict: bool = False,
         processing_enabled: bool = True,
         skip_existing_processing: bool = False,
         **kwargs,
@@ -104,7 +103,6 @@ def __init__(
         self._processing_enabled = processing_enabled
         self._multigrid_watcher: MultigridDirWatcher | None = None
         self._force_mdoc_metadata = force_mdoc_metadata
-        self._strict = strict
         self._skip_existing_processing = skip_existing_processing
         self._machine_config = get_machine_config_client(
             str(self._environment.url.geturl()),
@@ -120,12 +118,6 @@ def __init__(
         ]
         self.install_screen(MainScreen(), "main")
 
-    @property
-    def role(self) -> str:
-        if self.analyser:
-            return self.analyser._role
-        return ""
-
     def _launch_multigrid_watcher(
         self, source: Path, destination_overrides: Dict[Path, str] | None = None
     ):
@@ -291,16 +283,6 @@ def rsync_result(update: RSyncerUpdate):
                 force_mdoc_metadata=self._force_mdoc_metadata,
                 limited=limited,
             )
-            machine_data = requests.get(
-                f"{self._environment.url.geturl()}/machine"
-            ).json()
-            for data_dir in machine_data["data_directories"].keys():
-                if source.resolve().is_relative_to(Path(data_dir)):
-                    self.analysers[source]._role = machine_data["data_directories"][
-                        data_dir
-                    ]
-                    log.info(f"role found for {source}")
-                    break
             if force_metadata:
                 self.analysers[source].subscribe(
                     partial(self._start_dc, from_form=True)
diff --git a/src/murfey/client/tui/screens.py b/src/murfey/client/tui/screens.py
index 54d3b6e8e..2268014f5 100644
--- a/src/murfey/client/tui/screens.py
+++ b/src/murfey/client/tui/screens.py
@@ -89,19 +89,14 @@ def determine_default_destination(
         log.info(f"Processing only mode with sources {environment.sources}")
         _default = str(environment.sources[0].resolve()) or str(Path.cwd())
     elif machine_data.get("data_directories"):
-        for data_dir in machine_data["data_directories"].keys():
+        for data_dir in machine_data["data_directories"]:
             if source.resolve() == Path(data_dir):
                 _default = destination + f"/{visit}"
-                if analysers.get(source):
-                    analysers[source]._role = machine_data["data_directories"][data_dir]
                 break
             else:
                 try:
                     mid_path = source.resolve().relative_to(data_dir)
-                    if (
-                        machine_data["data_directories"][data_dir] == "detector"
-                        and use_suggested_path
-                    ):
+                    if use_suggested_path:
                         with global_env_lock:
                             source_name = (
                                 source.name
@@ -127,10 +122,6 @@ def determine_default_destination(
                                 environment.destination_registry[source_name] = _default
                     else:
                         _default = f"{destination}/{visit}/{mid_path if include_mid_path else source.name}"
-                    if analysers.get(source):
-                        analysers[source]._role = machine_data["data_directories"][
-                            data_dir
-                        ]
                     break
                 except (ValueError, KeyError):
                     _default = ""
@@ -209,10 +200,10 @@ def validate_form(form: dict, model: BaseModel) -> bool:
 class _DirectoryTree(DirectoryTree):
     valid_selection = reactive(False)
 
-    def __init__(self, *args, data_directories: dict | None = None, **kwargs):
+    def __init__(self, *args, data_directories: List[Path] | None = None, **kwargs):
         super().__init__(*args, **kwargs)
         self._selected_path = self.path
-        self._data_directories = data_directories or {}
+        self._data_directories = data_directories or []
 
     def on_tree_node_selected(self, event: Tree.NodeSelected) -> None:
         event.stop()
@@ -281,9 +272,7 @@ def compose(self):
         ).json()
         self._dir_tree = _DirectoryTree(
             str(self._selected_dir),
-            data_directories=(
-                machine_data.get("data_directories", {}) if self.app._strict else {}
-            ),
+            data_directories=machine_data.get("data_directories", []),
             id="dir-select",
         )
 
@@ -295,7 +284,7 @@ def compose(self):
 
         text_log.write("Selected directories:\n")
         btn_disabled = True
-        for d in machine_data.get("data_directories", {}).keys():
+        for d in machine_data.get("data_directories", []):
             if (
                 Path(self._dir_tree._selected_path).resolve().is_relative_to(d)
                 or self.app._environment.processing_only_mode
@@ -724,11 +713,7 @@ def on_button_pressed(self, event: Button.Pressed):
         if self._switch_status:
             self.app.install_screen(
                 DirectorySelection(
-                    [
-                        p[0]
-                        for p in machine_data.get("data_directories", {}).items()
-                        if p[1] == "detector" and Path(p[0]).exists()
-                    ]
+                    [p for p in machine_data.get("data_directories", []) if p.exists()]
                 ),
                 "directory-select",
             )
@@ -790,11 +775,7 @@ def on_button_pressed(self, event: Button.Pressed):
 
         self.app.install_screen(
             DirectorySelection(
-                [
-                    p[0]
-                    for p in machine_data.get("data_directories", {}).items()
-                    if p[1] == "detector" and Path(p[0]).exists()
-                ]
+                [p for p in machine_data.get("data_directories", []) if p.exists()]
             ),
             "directory-select",
         )
diff --git a/src/murfey/server/api/instrument.py b/src/murfey/server/api/instrument.py
index fb0fa37a5..4c32df65c 100644
--- a/src/murfey/server/api/instrument.py
+++ b/src/murfey/server/api/instrument.py
@@ -92,9 +92,7 @@ async def start_multigrid_watcher(
         _config = {
             "acquisition_software": machine_config.acquisition_software,
             "calibrations": machine_config.calibrations,
-            "data_directories": {
-                str(k): v for k, v in machine_config.data_directories.items()
-            },
+            "data_directories": [str(k) for k in machine_config.data_directories],
             "rsync_basepath": str(machine_config.rsync_basepath),
             "visit": visit,
             "default_model": str(machine_config.default_model),
diff --git a/src/murfey/util/config.py b/src/murfey/util/config.py
index fc058cca8..9380e33f3 100644
--- a/src/murfey/util/config.py
+++ b/src/murfey/util/config.py
@@ -14,7 +14,7 @@
 class MachineConfig(BaseModel, extra=Extra.allow):  # type: ignore
     acquisition_software: List[str]
     calibrations: Dict[str, Dict[str, Union[dict, float]]]
-    data_directories: Dict[Path, str]
+    data_directories: List[Path]
     rsync_basepath: Path
     default_model: Path
     display_name: str = ""
@@ -148,7 +148,7 @@ def get_machine_config(instrument_name: str = "") -> Dict[str, MachineConfig]:
         "": MachineConfig(
             acquisition_software=[],
             calibrations={},
-            data_directories={},
+            data_directories=[],
             rsync_basepath=Path("dls/tmp"),
             murfey_db_credentials="",
             default_model="/tmp/weights.h5",
diff --git a/src/murfey/util/dummy_setup.py b/src/murfey/util/dummy_setup.py
index c0ce4a12e..ca89645a6 100644
--- a/src/murfey/util/dummy_setup.py
+++ b/src/murfey/util/dummy_setup.py
@@ -17,10 +17,7 @@
 def initialise(dummy_location: Path) -> Path:
     base = dummy_location / "murfey_dummy"
     base.mkdir()
-    microscope_dir = base / "M"
     detector_dir = base / "Data"
-    microscope_dir.mkdir()
-    (microscope_dir / "Supervisor").mkdir()
     detector_dir.mkdir()
     (detector_dir / "Supervisor").mkdir()
     with open(base / "config.yaml", "w") as yaml_out:
@@ -28,10 +25,7 @@ def initialise(dummy_location: Path) -> Path:
             {
                 "m12": {
                     "acquisition_software": ["epu", "tomo", "serialem"],
-                    "data_directories": {
-                        str(detector_dir): "detector",
-                        str(microscope_dir): "microscope",
-                    },
+                    "data_directories": [str(detector_dir)],
                     "rsync_basepath": str(dummy_location),
                     "calibrations": {"dummy": 0},
                 }
@@ -99,7 +93,7 @@ def generate_data(base_path: Path, timeout: int | None = None, pause: int = 10):
                         base_path,
                         "Supervisor",
                         f"Position_{tilt}.mrc",
-                        data_dir="M",
+                        data_dir="Data",
                         size=(128, 128),
                     )
                 except ValueError:
diff --git a/tests/client/test_context.py b/tests/client/test_context.py
index d9cf4bf2b..c6431c72e 100644
--- a/tests/client/test_context.py
+++ b/tests/client/test_context.py
@@ -30,7 +30,6 @@ def test_tomography_context_add_tomo_tilt(mock_post, mock_get, tmp_path):
     (tmp_path / "Position_1_001_[30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_1_001_[30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -41,7 +40,6 @@ def test_tomography_context_add_tomo_tilt(mock_post, mock_get, tmp_path):
     (tmp_path / "Position_1_002_[-30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_1_002_[-30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -53,7 +51,6 @@ def test_tomography_context_add_tomo_tilt(mock_post, mock_get, tmp_path):
         mdoc.write("[ZValue = 0]\n[ZValue = 1]\n")
     context.post_transfer(
         tmp_path / "Position_1.mdoc",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -64,7 +61,6 @@ def test_tomography_context_add_tomo_tilt(mock_post, mock_get, tmp_path):
     (tmp_path / "Position_2_002_[30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_2_002_[30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -89,7 +85,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
     (tmp_path / "Position_1_001_[30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_1_001_[30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -100,7 +95,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
     (tmp_path / "Position_1_002_[-30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_1_002_[-30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -109,7 +103,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
     (tmp_path / "Position_2_002_[-30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_2_002_[-30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -119,7 +112,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
     (tmp_path / "Position_2_001_[30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_2_001_[30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -130,7 +122,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
     (tmp_path / "Position_3_002_[-30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_3_002_[-30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -143,7 +134,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
         mdoc.write("[ZValue = 0]\n[ZValue = 1]\n")
     context.post_transfer(
         tmp_path / "Position_1.mdoc",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -155,7 +145,6 @@ def test_tomography_context_add_tomo_tilt_out_of_order(mock_post, mock_get, tmp_
         mdoc.write("[ZValue = 0]\n[ZValue = 1]\n")
     context.post_transfer(
         tmp_path / "Position_2.mdoc",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -179,7 +168,6 @@ def test_tomography_context_add_tomo_tilt_delayed_tilt(mock_post, mock_get, tmp_
     (tmp_path / "Position_1_001_[30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_1_001_[30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -190,7 +178,6 @@ def test_tomography_context_add_tomo_tilt_delayed_tilt(mock_post, mock_get, tmp_
     (tmp_path / "Position_1_002_[-30.0]_date_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / "Position_1_002_[-30.0]_date_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -202,7 +189,6 @@ def test_tomography_context_add_tomo_tilt_delayed_tilt(mock_post, mock_get, tmp_
         mdoc.write("[ZValue = 0]\n[ZValue = 1]\n[ZValue = 2]\n")
     context.post_transfer(
         tmp_path / "Position_1.mdoc",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -213,7 +199,6 @@ def test_tomography_context_add_tomo_tilt_delayed_tilt(mock_post, mock_get, tmp_
     (tmp_path / "Position_1_003_[60.0]_data_time_fractions.tiff").touch()
     new_series = context.post_transfer(
         tmp_path / "Position_1_003_[60.0]_data_time_fractions.tiff",
-        role="detector",
         required_position_files=[],
         required_strings=["fractions"],
         environment=env,
@@ -246,7 +231,6 @@ def test_setting_tilt_series_size_and_completion_from_mdoc_parsing(
     assert len(context._tilt_series_sizes) == 0
     context.post_transfer(
         Path(__file__).parent.parent / "util" / "test_1.mdoc",
-        role="detector",
         environment=env,
         required_strings=["fractions"],
     )
@@ -257,7 +241,6 @@ def test_setting_tilt_series_size_and_completion_from_mdoc_parsing(
     (tmp_path / f"test_1_001_[{tilt:.1f}]_data_time_fractions.tiff").touch()
     context.post_transfer(
         tmp_path / f"test_1_001_[{tilt:.1f}]_data_time_fractions.tiff",
-        role="detector",
         environment=env,
         required_strings=["fractions"],
     )
@@ -269,7 +252,6 @@ def test_setting_tilt_series_size_and_completion_from_mdoc_parsing(
         (tmp_path / f"test_1_{i:03}_[{t:.1f}]_data_time_fractions.tiff").touch()
         context.post_transfer(
             tmp_path / f"test_1_{i:03}_[{t:.1f}]_data_time_fractions.tiff",
-            role="detector",
             environment=env,
             required_strings=["fractions"],
         )