diff --git a/openflexure_microscope/stage/mock.py b/openflexure_microscope/stage/mock.py
index 345d822f..0c2ddfec 100644
--- a/openflexure_microscope/stage/mock.py
+++ b/openflexure_microscope/stage/mock.py
@@ -1,5 +1,8 @@
 from openflexure_microscope.stage.base import BaseStage
+from openflexure_microscope.utilities import axes_to_array
 
+from collections.abc import Iterable
+import numpy as np
 
 class MockStage(BaseStage):
     def __init__(self, port=None, **kwargs):
@@ -22,6 +25,27 @@ class MockStage(BaseStage):
         }
         return state
 
+    def apply_config(self, config: dict):
+        """Update settings from a config dictionary"""
+
+        # Set backlash. Expects a dictionary with axis labels
+        if 'backlash' in config:
+            # Construct backlash array
+            backlash = axes_to_array(config['backlash'], ['x', 'y', 'z'], [0, 0, 0])
+            self.backlash = backlash
+
+    def read_config(self) -> dict:
+        """Return the current settings as a dictionary"""
+        blsh = self.backlash.tolist()
+        config = {
+                'backlash': {
+                    'x': blsh[0],
+                    'y': blsh[1],
+                    'z': blsh[2],
+                }
+            }
+        return config
+
     @property
     def n_axes(self):
         return self._n_axis
@@ -32,14 +56,20 @@ class MockStage(BaseStage):
 
     @property
     def backlash(self):
-        return self._backlash if self._backlash else [0]*self.n_axes
+        if self._backlash is not None:
+            return self._backlash
+        else:
+            return np.array([0] * self.n_axes)
 
     @backlash.setter
     def backlash(self, blsh):
         if blsh is None:
             self._backlash = None
-        assert len(blsh) == self.n_axes
-        self._backlash = [int(blsh)]*self.n_axes
+        elif isinstance(blsh, Iterable):
+            assert len(blsh) == self.n_axes
+            self._backlash = np.array(blsh)
+        else:
+            self._backlash = np.array([int(blsh)]*self.n_axes, dtype=np.int)
 
     def move_rel(self, displacement, axis=None, backlash=True):
         pass