I have always loved my 1983 MPC New York Central 20th Century Ltd set. I purchased the add-on diner and sleeper when they became available. Unfortunately, when I switched from tubular track to Atlas, I lost the ability of magne-traction to grip the rails.....I could never run the complete ABA set with the 7 cars.
At York, I picked up my F3 A unit where it was retro-fitted with traction tires.....now, there is no stopping the complete consist......
Peter