Extending a base feature is easy, and is shown here: https://xenforo.com/community/threads/how-to-add-more-actions-to-an-existing-controller.11202/ Now, how would I go about overriding an existing controller. Would I essentially do the same, but change the action to be the one I want to override? (Coming from a Java/C#/C++ background, and you'd simply override the method you want.) eg. Copy pasting the actionUpdate from ControllerPublic/Report.php and putting it in my addon like the above link and making changes that I want?