Hi NScalers: I received a Kato GS-4 black war baby yesterday. I put it on the track and it pulled 42 MT and Atlas 2-bay hoppers with no effort at all! I want to replace the Kato couplers with MT couplers (Z Scale on pilot and a MT 1015 on tender.) Problem is how to do this? How do you get the rear coupler on the tender off? Jerry Geisert