diff --git a/Usage Docs/12to13.md b/Usage Docs/12to13.md
index 01b9d70..96bf568 100644
--- a/Usage Docs/12to13.md	
+++ b/Usage Docs/12to13.md	
@@ -34,12 +34,19 @@ let namespaceSocket = manager.socket(forNamespace: "/swift")
 In v13 `defaultSocket` and `namespaceSocket` will share a single transport. This means one less connection to the server
 needs to be opened. 
 
-## What do I have to change?
+## What might I have to change?
 
-The most obvious thing you will need to change is that instead of creating `SocketIOClient`s directly, you will create a
+- The most obvious thing you will need to change is that instead of creating `SocketIOClient`s directly, you will create a
 `SocketManager` and either use the `defaultSocket` property if you don't need namespaces, or call the 
 `socket(forNamespace:)` method on the manager.
 
+- `SocketIOClient` is no longer a client to an engine. So if you were overriding the engine methods, these have been moved 
+to the manager. 
+
+- The library is now a single target. So you might have to change some of your Xcode project settings.
+
+- `SocketIOClient`s no longer take a configuration, they are shared from the manager.
+
 ----------
 
 # What things should I know?