diff --git a/charts/events/Chart.yaml b/charts/events/Chart.yaml
index 078308b2a..4faea62d4 100644
--- a/charts/events/Chart.yaml
+++ b/charts/events/Chart.yaml
@@ -3,7 +3,7 @@ name: events
 description: Data Analysis event triggering
 type: application
 
-version: 0.2.7
+version: 0.2.8
 
 dependencies:
   - name: argo-events
diff --git a/charts/events/crds/trigger-crds.yaml b/charts/events/crds/trigger-crds.yaml
index 648dc6106..d863fbb7d 100644
--- a/charts/events/crds/trigger-crds.yaml
+++ b/charts/events/crds/trigger-crds.yaml
@@ -39,8 +39,13 @@ spec:
                       properties:
                         name: 
                           type: string
-                        messagePath:
+                        path:
                           type: string
+                        default:
+                          type: string
+                      anyOf:
+                        - required: [name, jsonPath]
+                        - required: [name, default]
             required:
               - workflow
               - eventName
diff --git a/charts/events/hooks/sync.py b/charts/events/hooks/sync.py
index 4990bd975..e89a5cc4d 100644
--- a/charts/events/hooks/sync.py
+++ b/charts/events/hooks/sync.py
@@ -74,15 +74,27 @@ def sync(self, parent: dict, related: dict) -> SyncResponse:
       templateArgs = []
 
       for userParam in userParameters:
+        param_name: str = userParam.get("name", "")
+        path: str = userParam.get("path", "")
+        default: str = userParam.get("default", "")
+
+        if not param_name:
+          continue
+
+        src = {"dependencyName": name}
+
+        if path:
+          src.update({"dataKey": "body." + path})
+
+        if default:
+          src.update({"value": default})
+
         sensorParams.append({
-          "src": {
-            "dependencyName": name,
-            "dataKey": userParam.get("messagePath", "")
-          },
-          "dest": f"spec.arguments.parameters.{userParameters.index(userParam)}.value"
+          "src": src,
+          "dest": f"spec.arguments.parameters.#(name==\"{param_name}\").value"
         })
 
-        templateArgs.append({"name": userParam.get("name")})
+        templateArgs.append({"name": param_name, "value": ""})
 
       triggers.append({
         "template": {
diff --git a/charts/events/templates/example-trigger.yaml b/charts/events/templates/example-trigger.yaml
index 6ed2d7ba7..241f949e3 100644
--- a/charts/events/templates/example-trigger.yaml
+++ b/charts/events/templates/example-trigger.yaml
@@ -12,16 +12,13 @@ spec:
   workflow:
     template: example-template
     parameters:
-      - name: jpg
-        messagePath: body.parameters.jpg
-      - name: jpeg
-        messagePath: body.parameters.jpeg
       - name: tif
-        messagePath: body.parameters.tif
+        path: parameters.tif
       - name: tiff
-        messagePath: body.parameters.tiff
+        path: parameters.tiff
       - name: png
-        messagePath: body.parameters.png
+        path: parameters.png
+        default: "true"
 ---
 apiVersion: workflows.diamond.ac.uk/v1alpha1
 kind: Trigger
@@ -37,7 +34,7 @@ spec:
     template: access-visit-dir
     parameters:
       - name: visitdir
-        messagePath: body.doc.data_session_directory
+        path: doc.data_session_directory
     
 ---
 apiVersion: workflows.diamond.ac.uk/v1alpha1
@@ -54,5 +51,5 @@ spec:
     template: echo-workflow-template
     parameters:
       - name: message
-        messagePath: body.name
+        path: name
 {{- end }}