Super, I would agree, those length of trains would probably need multiple power cars, in fact you can see multiples of them in the train lengths. I also wondered how the guy had put together such long trains, either he must have a source of individual carriages or a stack of spare trailers/leads. Personally I would have thought a better idea would have been to use standard 4 car lengths and use the connectors usually provided with advance sets to connect them. Regardless I'm still impressed - they look great and even if he did buy say 10 sets of each type it is still way cheaper than buying the normal 'N' gauge equivalent 
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