diff --git a/src/openflexure_microscope_server/things/camera_stage_mapping.py b/src/openflexure_microscope_server/things/camera_stage_mapping.py
index 7257c0f9..409aa800 100644
--- a/src/openflexure_microscope_server/things/camera_stage_mapping.py
+++ b/src/openflexure_microscope_server/things/camera_stage_mapping.py
@@ -309,18 +309,18 @@ def csm_img_to_stage(
 ) -> Mapping[str, int]:
     """Apply any CSM matrix to image coordinates.
 
-    This is designed x and y must be kwargs and extra kwargs are ignored allowing:
+    x and y must be kwargs and extra kwargs are ignored, allowing:
     ``csm_img_to_stage(matrix, **position)`` to run for a mapping position.
 
     Note that x and y are the actual (x, y) of the image, not the (m, n) indices used
-    numpy
+    by numpy
 
     :param matrix: The matrix to use in the calculation
     :param x: the x image coordinate (keyword only)
     :param y: the y image coordinate (keyword only)
     :return: The resulting stage coordinates as a mapping.
     """
-    # Note this is (y,x) not x,y to put it in numpy image indices
+    # Note this is (y,x) not (x,y) to put it in numpy image indices
     relative_move: np.ndarray = np.dot(np.array([y, x]), np.array(matrix))
     return {"x": round(relative_move[0]), "y": round(relative_move[1])}
 
@@ -334,7 +334,7 @@ def csm_stage_to_img(
 ) -> Mapping[str, float]:
     """Apply any CSM matrix to stage coordinates to get image coordinates.
 
-    This is designed x and y must be kwargs and extra kwargs are ignored allowing:
+    x and y must be kwargs and extra kwargs are ignored, allowing:
     ``csm_img_to_stage(matrix, **position)`` to run for a mapping position.
 
     Note that x and y are the actual (x, y) of the image, not the (m, n) indices used
@@ -347,5 +347,5 @@ def csm_stage_to_img(
     """
     inverse_matrix = np.linalg.inv(np.array(matrix))
     relative_move = np.dot(np.array([x, y]), inverse_matrix)
-    # Note that the relative move (y, x) as it is from numpy and is in matrix coords.
+    # Note that the relative move is (y, x) as it is from numpy and is in matrix coords.
     return {"x": float(relative_move[1]), "y": float(relative_move[0])}
diff --git a/src/openflexure_microscope_server/things/stage_measure.py b/src/openflexure_microscope_server/things/stage_measure.py
index 370943e5..e6aa1fd5 100644
--- a/src/openflexure_microscope_server/things/stage_measure.py
+++ b/src/openflexure_microscope_server/things/stage_measure.py
@@ -100,7 +100,7 @@ class RomDataTracker:
         turning_loc = fit_func.deriv().roots[0]
         turning_z = fit_func(turning_loc)
 
-        # As we only move in 1 direction pull the other axis from the coords.
+        # As we only move in 1 direction, pull the other axis from the coords.
         other_axis = "x" if axis == "y" else "y"
         other_coord = self.stage_coords[-1][other_axis]
         return {axis: int(turning_loc), other_axis: other_coord, "z": int(turning_z)}
@@ -426,7 +426,7 @@ class RangeofMotionThing(lt.Thing):
     def _img_dir_from_stage_coords(
         self, target: dict[str, int], axis: Literal["x", "y"], rom_deps: RomDeps
     ) -> Literal[1, -1]:
-        """For a target location in stage coords return the direction in image coordinates.
+        """For a target location in stage coords, return the direction in image coordinates.
 
         :param target: The target poisiton in stage coordinates
         :param axis: The axis which is being measured. This must be 'x' or 'y'.
@@ -434,9 +434,11 @@ class RangeofMotionThing(lt.Thing):
         :return: Direction to move in image coordinates.
         """
         target_im_coords = rom_deps.csm.convert_stage_to_image_coordinates(**target)
-        here = rom_deps.stage.position
-        here_im_coords = rom_deps.csm.convert_stage_to_image_coordinates(**here)
-        return -1 if target_im_coords[axis] < here_im_coords[axis] else 1
+        current_loc = rom_deps.stage.position
+        current_loc_im_coords = rom_deps.csm.convert_stage_to_image_coordinates(
+            **current_loc
+        )
+        return -1 if target_im_coords[axis] < current_loc_im_coords[axis] else 1
 
     def _distance_in_img_percentage(
         self, target: dict[str, int], axis: Literal["x", "y"], rom_deps: RomDeps
@@ -453,8 +455,8 @@ class RangeofMotionThing(lt.Thing):
                 "Stream resolution must be set before converting coords to percentage"
             )
 
-        here = rom_deps.stage.position
-        move_stage = {key: target[key] - here[key] for key in target}
+        current_loc = rom_deps.stage.position
+        move_stage = {key: target[key] - current_loc[key] for key in target}
         move_img = rom_deps.csm.convert_stage_to_image_coordinates(**move_stage)
 
         img_index = 0 if axis == "x" else 1