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Roundhouse CNW Covered Hoppers.  These are the most common covered hopper found on the East End that are not from a Chessie road.  You need lots of these.  These large PS type covered hoppers are seen on unit grain trains running over the East End.  Intermix them with the grey Life-Like P2K covered hopper.  Additionally there should be one or two CNW green ACF cars and maybe one ex-Rock Island renumbered car.  Notice the logos on CNW cars come in yellow and black or red, white and black.  Both are appropriate, the red, white and black one is more common.  These kits came assembled when I bought them off eBay.  The only thing I did to them was weather them.