https://www.fiferhobby.com/n-scale-body-shell-removal/
https://www.bachmanntrains.com/home-usa/board/index.php?topic=18274.0;wap2
the Fifer way , it should work on snap on HO top's , also the Bachmann way
https://www.bachmanntrains.com/home-usa/board/index.php?topic=18274.0;wap2
the Fifer way , it should work on snap on HO top's , also the Bachmann way