i think they should have the sparks that the subway 3rd rails make but it should be use as a track object. i have gmax but i don't really know how to use it, the idea is like this: if the train run past the spark object the bogey will make a blue spark if you set it for the right or left side. the same way that the signals and track objects are meant for the trains for when they run by is the same way that sparks would work. when i get a hang of GMAX im going to create this