A bit of light relief from modern stuff! Call me old fashioned but these early cars seem to refresh the memory of what it was all about in the early days. A fair turn of speed up Hammer Hill by some of the cars, including the steamers! Never mind electric, how about a steam driven Marlin conversion?
https://www.youtube.com/watch?v=-ts1bx57Z4I
https://www.youtube.com/watch?v=-ts1bx57Z4I