this service is coupling with too many wagons being unable to pull away with then after i uncoupled some i was able to drive again
I had no problems with the 36 cars and the 2 Class 20 at the end, I didn't even use any sand. Start off slowly with throttle 2, once you reach 2 mph, you can slowly increase to throttle 3, and then full power throttle 4 once you hit 4 mph.