Hey there!
I really like 4 stud wide Lego trains, but haven't found a good way to motorize them yet.
I thought about using Circuit Cubes, but they would still be too big for me, and according to their website they would only last 1 hour on batteries.
That's why I was thinking to motorize the tracks instead of the train, using some sort of chain mechanism.
Included is a render of something I've been tinkering with, that is probably over-engineered and too expensive.
I was wondering if someone else has made something like this before, as then I wouldn't have to go through all the trouble of reinventing it.
Thanks,
CodeHard