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Hi Nigel & Rail61. <br />Now you have me curious. That'll take a bit to set up, but I think I have the materials around to make the test. <br />Though operating helpers is neat, I thought it might be a little sad looking if I had to run 5 engines to get a 30 car train up a 3% incline. I thought 2 SD-90's would be a reasonable maximum for 30 cars on a model layout (maybe 4 or 5 SD-40's). One often sees CP running 3 AC4400's/SD-90s with 100 car trains through the mountains including the spiral tunnels near Golden BC. <br />Cheers! <br />Christopher
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