Great save there Ben. The MKT 9023 black flatcar is somewhat rarer than the other 90?? series Lionel flatcars. The yellow UP 9020 & C&O 9024 variations are the far more common ones. The ATSF 9022 comes in Black, Red as far as I know. The 9026 Republic comes in blue. I also have some of these style, same mold configuration of Lionel flatcars that have no lettering whatso ever but they are silvery grey or brown in color. As you have certainly show in your video one can adapt most any brand truck to these flatcars. Thanks for posting these videos.