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I have two 6 axle Bachman spectrum engines (SD70MACS). Both derail almost every time they enter the frog on mainline at the opposite end of where the points are located. As near as I can tell the wheels drop into the hole of the frog then try to climb out the wrong way. I have searched all the forums I know of and can't seem to find anyone else with this problem. I have gauged the turnout with the NMRA guage and did find that the guardrail's opening was too wide, which I corrected with a styrene shim. Had no effect on this problem. Both of the engines wheelsets are in guage. I have absolutely no problem with 9 other engines of various makes that have 4 axle wheelsets. The track is flat and secure although there is a curved incline bottom 12" from the beginning of the frog. There is also a rerailer in that span. HALP!!! Regards, Marty
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