Split Screen with over 4 players

Forgive the thread revival, but I’m tearing hairs out trying to get more than 4 player local…mostly probably due to my lack of knowledge on how to use C++ with UE4.

I’ve tried to create a child C++ class based on GameViewPortClient from within the editor, but I am not sure I can simply create a child class, set the variable, then change the default viewport class in the editor to my new GameViewPortClient class.

Do I need to get the source from GitHub in order to change the GameViewPortClient directly to remove the hard lock?