Rick, this is just a point of interest.
You mentioned NH's early PS-1 boxcars. Beginning in 1963, the Akron Canton & Youngstown leased 147 of the 10'0" IH PS-1 cars, which became AC&Y 3200-3346. They also leased 113 of the 10'6" IH PS-1 cars, which became AC&Y 3347-3459. These were the first boxcars to carry AC&Y's bright yellow paint scheme with red lettering. They were off the AC&Y roster in 1979. Some other AC&Y yellow cars had black lettering.