diff --git a/utils/raspberrypi/ctt/ctt_vc4.py b/utils/raspberrypi/ctt/ctt_vc4.py
index 7154e110..dd0c5414 100755
--- a/utils/raspberrypi/ctt/ctt_vc4.py
+++ b/utils/raspberrypi/ctt/ctt_vc4.py
@@ -55,12 +55,16 @@ json_template = {
         },
         "exposure_modes": {
             "normal": {
-                "shutter": [100, 10000, 30000, 60000, 120000],
-                "gain": [1.0, 2.0, 4.0, 6.0, 6.0]
+                "shutter": [100, 10000, 30000, 60000, 66666],
+                "gain": [1.0, 2.0, 4.0, 6.0, 8.0]
             },
             "short": {
-                "shutter": [100, 5000, 10000, 20000, 120000],
-                "gain": [1.0, 2.0, 4.0, 6.0, 6.0]
+                "shutter": [100, 5000, 10000, 20000, 66666],
+                "gain": [1.0, 2.0, 4.0, 6.0, 8.0]
+            },
+            "long": {
+                "shutter": [ 100, 10000, 30000, 60000, 120000 ],
+                "gain": [ 1.0, 2.0, 4.0, 6.0, 8.0 ]
             }
         },
         "constraint_modes": {
@@ -120,6 +124,9 @@ json_template = {
     "rpi.ccm": {
     },
     "rpi.sharpen": {
+        "threshold": 0.75,
+        "limit": 0.5,
+        "strength": 1.0
     }
 }