Hi! The present MicroTrains coupler for the F7 is actually the second of that line. The original is MUCH SUPERIOR to the current piece of junk. If anyone has any of the original MT coupler sets, I will pay $25 for each package (no, I'm not kidding). You can tell the original because it includes a piece of plastic casting that attaches to the frame of the locomotive. There is a slot in this casting that accepts a 1015 coupler, and has a pre-drilled screw hole. I can't think of a better way to mount a coupler!