Walthers/P2K has done an outstanding job on this little gem! Not only have they done their homework and detailed it right to the prototype, but this little jewel runs as good as it looks. The slow speeds and smoothness of the drive allow for precise coupling without even moving the car you are coupling to. And when you take up the slack, it will start the cut of cars one car at a time just like the prototype. And if that's not enough, the sounds are unbelievable!! You get the impression that you are actually in the cab operating a real locomotive. It's worth every penny!! OUTSTANDING JOB WALTERS!!!