This same site, in addition to the time saver (which I think is a minimum of 40-ish moves), there is an Inglenook puzzle, which is happily different every time.
you have a small yard (holding 3, 3, 5 cars in its area), you get a random 5 car outgoing train to assemble from the 8 available cars.
depending on my luck in the 5-car train to assemble, I can clear it in 18-40 moves. But because its always *different*, it has a lot better replay value. less frustration to it as well.