I have "improved" the engine with all LED lighting, including some cool effects in the turbine inlet. On my to-do list, I am going to do LED lighting in the cars and add some special effects. I did add an LED to the observation car taillight to make it stand out.
It runs OK on magnetic track with one motor, but when I was running it on Atlas track, it couldn't get out of it's own way. The two motors cured all of that and more.