I have the 30-2717-1 Grand Trunk and Western F-3 A-B-A diesel locomotive set, which did indeed have frame casting issues. I didn't notice the problem until years later, so I ended up buying another set of Railking F-3s to serve as frame donors - made the GTW set mighty expensive. Might the problem also extend to other similar engines which were produced around the same time (2006)?
Years ago, I had a NIB K-Line circus TOFC where the roof of the trailer warped and cracked. Sorry, but I don't have the item number, but it was probably produced in the early 1990s.
Are we sure that the internet is big enough to hold the entire list of modern trains with casting issues?