Came across this youtube video about installing a sound unit into a Polar Express trolley
https://www.youtube.com/watch?v=VQUFOPOuoOU
Don't know whether the installer is a member of this forum but can anyone tell from this photo if you can keep the light when installing the mod or does it need to be severed and discarded as shown in the video? Also, is there a better sound module to use other than the one used in this video?
Has anyone here added sound to a Lionel bump-and-go trolley?