popping the top

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how does the top come off the Acela express...decoder goin in

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ok I figure it out...didn't know the dummy needed a decoder too, for the lights

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ok what good is it to put a decoder in the engine to run it dcc when the rear dummy engine has no plug for a decoder so a non plug type decoder has to be hard wired into the wiring of the dummy engine or else the forward and reverse lights stay on all the time...were they just not thinking or what...this is very disappointing considering its a $400.00 train set....very unhappy with this product and also both doors on the dummy engine are open all the time as the extremely small and cheap spring won't stay in place to keep the doors closed