Posting this as more of a lesson learned. Was opening the new CNW passenger cars and taking them out of the box to inspect and run on the track. Well one of the cars coupler was not right.
So I took the car apart to see how to fix the coupler then noted I was missing a screw. As per the picture (at joint at 90 degrees) you will possibly see where a missing screw is. So looked in the packaging and no screw. Between taking the car apart which was the least amount of time I spent over an hour finding the missing screw including looking for replacement as I keep all kinds of parts/screws. This is one tiny screw.
So between where I opened the passenger car to the layout I finally found the screw.
My tip is open stuff and inspect in the same location and perhaps with some level of method to ensure any small parts that may fall out you might locate sooner. I am sure there are many on this forum who have a method but I know I will be more methodical. Now back to running trains.
