I recently purchased a MTH 2-8-8-8-2 Triplex Locomotive. first off, it's heavy as heck. But the thing that bothers me the most is that the very front of the engine keeps falling away from the rest of the train. It doesn't fall off, but it falls away. I am wondering if anyone else who has purchased that same locomotive has had the same problem. Secondly, with it I purchased the MTH DCS remote control. Must I use AC power with this unit, or will any DC transformer work. I tried it with a PIKO transformer and the unit did not even recognize my train. Any help would be appreciated. Also, are there used G scale units for sale out there on some web site? I don't think my hobby will last long if I have to keep shelling out the costs for units that is associated with G scale.