How a NYC Subway is made

Thanks very much for that post, i was always partial to the old school cars, but after seeing that video,i would definitely reconsider  my personal thoughts about those black faced new cars, the sides seemed like the r46s and the bonnets seemed boring and featureless. but from a technical point of view, the are superior in design and construction with the mostly stainless design, i really liked the modular AC system,very nice post, Gman.