diff --git a/src/v2/tpms.yaml b/src/v2/tpms.yaml
index f6e63e1..fbf8c06 100644
--- a/src/v2/tpms.yaml
+++ b/src/v2/tpms.yaml
@@ -167,6 +167,23 @@ paths:
           $ref: "#/components/responses/GenericError"
       security: 
       - SessionScheme: []
+  /CustomerStorages/{Guid}/custommethods/Predecessor:
+    get:
+      tags:
+      - "TPMS / customer storage"
+      parameters:
+      - $ref: "#/components/parameters/GuidPathParameter"
+      responses:
+        200:
+          description: "successful operation"
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/CustomerStorage"
+        default:
+          $ref: "#/components/responses/GenericError"
+      security: 
+      - SessionScheme: []
   /CustomerStorages/{Guid}/custommethods/Rearrange:
     post:
       tags:
@@ -184,6 +201,23 @@ paths:
           $ref: "#/components/responses/GenericError"
       security: 
       - SessionScheme: []
+  /CustomerStorages/{Guid}/custommethods/Successor:
+    get:
+      tags:
+      - "TPMS / customer storage"
+      parameters:
+      - $ref: "#/components/parameters/GuidPathParameter"
+      responses:
+        200:
+          description: "successful operation"
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/CustomerStorage"
+        default:
+          $ref: "#/components/responses/GenericError"
+      security: 
+      - SessionScheme: []
   /CustomerStoragePositions/{Guid}:
     get:
       tags: