I was testing this mod with Multiple Unit Train Control and discovered that when your "internal library" is enabled, it does not handle the "script_raised_built" event the way the official "Electric Vehicles Lib: Reborn" mod does. That means that when MUTC replaces locomotives with the double-power version, the new locos are not registered and don't get any fuel. If anyone asks, I'll tell them to install the external library to fix it, but I thought you might want to include a fix in a future release since the whole event framework is getting disrupted anyways.