diff --git a/config/example_config.js b/config/example_config.js
deleted file mode 100644
index 85c3985..0000000
--- a/config/example_config.js
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
-This is an example configuration file for SciKit-SurgeryBARD post
-v0.1.0. It is not valid json, to use it you can first need to remove
-comments with something like https://pypi.org/project/JSON_minify/
-*/
-
-/*
-BARD configuration is divided into 5 optional dictionaries
-camera, tracker, models, pointer, and interaction.
-*/
-
-{
-    /* Camera dictionary defines the parameters for the video source
-    that forms the back ground of the augmented reality */
-    "camera": {
-	/* source defines an opencv video soure, integer or filename,
-	defaults to 0 */
-        "source": 0, 
-	/* window size defines the size of the video image to use. If 
-	not set this delegates to 
-	sksurgeryimage.acquire.video_source.TimestampedVideoSource
-	which set's them to cv2.CAP_PROP_FRAME_WIDTH and 
-	cv2.CAP_PROP_FRAME_HEIGHT which will depend on the source you're 
-	using. Take care that the window size matches the image size
-	used during camera calibration */
-        "window size": [640, 480],
-	/* calibration directory containing an .intrinsics.txt 
-	and a .distortion.txt file. This will be ignored if you 
-	use the -d command line argument*/
-        "calibration directory": "data/calibration/matts_mbp_640_x_480"
-    },
-    "tracker" : {
-	"type" : "sksaruco", /*alternatively sksndi*/
-	/* The tracker configuration follows the same format as
-	   the tracker in use with the exceptions listed below. 
-	   Note that the name of the rigid bodies should be the same
-	   as in the model list, by default reference and pointer.
-	   Exceptions for sksaruco
-	   BARD allows source as synonym of video source, if no source 
-	   or video source is set this defaults to the same value used 
-	   for the camera configuration. */
-	"source" : 0,
-	/* BARD allows us to use calibration directory in line with the 
-	   camera settings. If not calibration parameters are set
-	   this defaults to the same as in the camera settings */
-	"calibration directory": "data/calibration/matts_mbp_640_x_480",
-	rigid_bodies : [ {
-			"name" : "modelreference",
-                	"filename" : "data/reference_for_small_liver.txt"
-                	"aruco dictionary" : "DICT_ARUCO_ORIGINAL"
-			},
-			{
-			"name" : "pointerref",
-			"filename" : "data/pointer.txt",
-                	"aruco dictionary" : "DICT_ARUCO_ORIGINAL"
-			}]
-    },
-	
-    "models": {
-	/* A directory containing anatomy models. */
-        "models_dir": "data/models",
-	/* The rigid transform from the model reference to the models */
-        "reference_to_model": "data/reference_to_model.txt",
-	/* The number of anatomy elements that are visible in through the 
-	   video, i.e. the liver surface is visible, but the veins etc. are 
-	   not. The file names in in models_dir must be set so that 
-	   the visible anatomy is loaded first
-	*/
-        "visible_anatomy": 1
-    },
-    "pointer": {
-	/* A file defining the location of the pointer tip 
- 	   relative to the pointer reference
-	*/
-        "pointer_tag_to_tip": "data/pointer_tip.txt"
-    },
-    "interaction": {
-        "keyboard": true,
-        "footswitch": true,
-        "maximum delay": 2.0,
-        "mouse": true
-    }
-}
diff --git a/config/example_config.json b/config/example_config.json
index 7888332..a234775 100644
--- a/config/example_config.json
+++ b/config/example_config.json
@@ -8,9 +8,9 @@
 	"type" : "sksaruco",
 	"source" : 0,
 	"calibration directory": "data/calibration/matts_mbp_640_x_480",
-	rigid_bodies : [ {
+	"rigid bodies" : [ {
 			"name" : "modelreference",
-                	"filename" : "data/reference_for_small_liver.txt",
+                        "filename" : "data/reference.txt",
                 	"aruco dictionary" : "DICT_ARUCO_ORIGINAL"
 			},
 			{