Maybe a little off-topic. I know all of the older Hudsons pretty well. But who can point me to a list of the Hudsons made from, say, 1993 or 1994 through to the 11209 Vision Line model? I'm trying to figure out when Lionel changed the chassis (I think it went through at least two iterations.) Also, which ones have the wheels that screw into the ends of the axles. Thanks!