diff --git a/openflexure_microscope/api/v2/views/actions/stage.py b/openflexure_microscope/api/v2/views/actions/stage.py
index d13774ab..20412a6f 100644
--- a/openflexure_microscope/api/v2/views/actions/stage.py
+++ b/openflexure_microscope/api/v2/views/actions/stage.py
@@ -10,9 +10,9 @@ class MoveStageAPI(ActionView):
             load_default=False,
             metadata={"description": "Move to an absolute position", "example": False},
         ),
-        "x": fields.Int(load_default=None, metadata={"example": 100}, allow_none=False),
-        "y": fields.Int(load_default=None, metadata={"example": 100}, allow_none=False),
-        "z": fields.Int(load_default=None, metadata={"example": 20}, allow_none=False),
+        "x": fields.Int(load_default=None, metadata={"example": 100}, allow_none=True),
+        "y": fields.Int(load_default=None, metadata={"example": 100}, allow_none=True),
+        "z": fields.Int(load_default=None, metadata={"example": 20}, allow_none=True),
     }
 
     def post(self, args):
diff --git a/openflexure_microscope/api/v2/views/stage.py b/openflexure_microscope/api/v2/views/stage.py
index bcfec3a9..c6437a24 100644
--- a/openflexure_microscope/api/v2/views/stage.py
+++ b/openflexure_microscope/api/v2/views/stage.py
@@ -7,7 +7,7 @@ class StageTypeProperty(PropertyView):
     """The type of the stage"""
 
     schema = fields.String(
-        load_default=None,
+        load_default="SangaStage",
         validate=validate.OneOf(["SangaStage", "SangaDeltaStage"]),
         metadata={
             "description": "The translation stage geometry",
diff --git a/openflexure_microscope/camera/pi.py b/openflexure_microscope/camera/pi.py
index f3a1db16..e46360fa 100644
--- a/openflexure_microscope/camera/pi.py
+++ b/openflexure_microscope/camera/pi.py
@@ -30,7 +30,7 @@ import logging
 import time
 
 # Type hinting
-from typing import BinaryIO, Tuple, Union, Optional
+from typing import BinaryIO, Optional, Tuple, Union
 
 import numpy as np
 
diff --git a/openflexure_microscope/config.py b/openflexure_microscope/config.py
index 8ceed138..b2db8546 100644
--- a/openflexure_microscope/config.py
+++ b/openflexure_microscope/config.py
@@ -5,7 +5,6 @@ import os
 import shutil
 from typing import Optional
 
-
 from .json import JSONEncoder
 from .paths import CONFIGURATION_FILE_PATH, SETTINGS_FILE_PATH