Explains why adding this event handler didn't make the print statements appear twice, thanks for the explanation.
The result of the button pressed within the GUI changes the value, or sending a command. As of yet I don't think the value is ever changed because I haven't finished my packet handler.
Thanks, will try that. Do I need to register said class somewhere? Such as in the @Mod class?
EDIT: Never mind, found it. (NetworkRegistry.registerConnectionHandler())