I have old 4-8-4 Daylight, not the pancake motor but not the newest style. The engine runs great but will not climb a 2% grade with more than 2 cars. I have several newer style 4-8-4s but would like to modify this to a GS2 engine rather than just discard it. Has anyone used another non-Bachmann motor in one of these engines? I am not opposed to doing some modification to the frame. This model has a rather large flywheel with the gearing on the outside of the flywheel. Seems like this would be gearing the engine pretty tall. If you have modified one of these I would be interested, or.... are there any tricks to improving the torque of these older motors so modifying the frame would not be necessary? Steve, near Walla Walla