I have a set due to arrive tomorrow. I read the manual from the MTH website for the engine and It looks like the smoke fluid is added to the stack opposite of the one with the piping detail. Is the main stack in front with a diverter to the rear stack? I would assume you would add the fluid to the stack nearest the smoke unit and not the other?
Also is it a good idea to run the ABA set by itself to break it in before pulling a long consist of cars and if so how long?