A short story with a few questions. (the ? are in the story)

Tonite after work I headed down to a new spot I found for trains, its in Akron,Ohio and it right at a wye!

so I hear on the scanner that a train is approching from the west and I wait. This train passes and its 2 Locomotives a slug and a third loco and boy is this thing long. So anyway its going by and I spot a mixed consist of freight cars tank cars and then I spot one I dont remember seeing before it looked like a short sided hopper but the sides looked as if they were hinged. What was this? then it goes by and I spot 2 John Deere tractors on a flat car and at the tail end of this train I see a couple of Piggy back type cars that have brite green placards on them about going to home shop for repair do not load. Whats that all about?

I waited about 3 minutes and another train approches and its an old Conrail engine (8764 I think) With a large consist of grain cars some were still marked as Chessie System cars and a couple were Conrail and then the very last one was from a pool from mexico I can not remeber its name something MEX. Anyone ever heard of them?

All in all a great night for Railfanning just led to too many questions. Sorry to ask so much I really want to learn because these were some really great ideas for my layout.

thanks in advance.

1,sounds like a Difco side dumping ballast car made in Findley.3,I think CSX is leasing carsthat used to be used by Mexican shippers.Whenever my employer loads a CSX corn unit train a few Conrail or ex-Mexico cars are used in it.