I have a soft spot in my heart for MPC. My first set was a Black River Freight set. I bought one that was still new in the box a few years ago. Yesterday, I saw a Santa Fe Freight set, 6-1383 (with the blue bonnet Santa Fe Alco), and for some reason I just had to have it. It is also new in the box.
I would like to add weight to the rolling stock to help keep it from derailing. But I've also considered trying to take on the project of adding a light to the caboose or adding other details to the cars. Has anyone undertaken such a project? If so, would you like to share pictures?