I am finishing the trolley to give to my grandson next Christmas (along with a power pack). 2 Extra LED lights + passengers + destination signs.
Does your motor make a whining noise when it runs? This one does. If not, anything that can be done short of replacement (I know, I should have found this out before spending all that time enhancing it).
I can post a sound clip if necessary. It's not super loud, but it is noticeable.
Thanks,
John