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I recently purchase a new old stock Premier Allegheny (20-3507-1).  It was originally offered in 2014, and from what I can tell it was never opened or run. The odometer was 0.4 miles when I first tested it, and it was wrapped like it had never been opened.

I have a Fastrack layout and it runs beautifully on my 0-72 curves and straights.  Unfortunately it stalls on all of my O-72 switches.  It appears to create a short on the switch, because it blows the fast acting fuses that I use (and also the circuit breakers on my MPC Dual Power transformer).  I have an MTH Premier 2-10-4 that runs through these O-72 switches with out any issues.

Below are pictures of the two sets of drivers from the Allegheny.  I don't see any obviously wrong.  I thought the drivers might dirty and I cleaned them.  The "paint" on the driver's does seem odd, so I am not sure if that is the cause of my issue or not.  Any suggestions on what to do next is greatly appreciated.  TIA.

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This sounds similar to a situation with the K Line supersnap switches.

Make note of where the loco stops on the switch. If the roller spacing is such that a roller contacts the point at same time a wheel is going past the point and contacts it as well, the point will act as a "jumper" between the roller and the wheel, and cause a short.

A strip of electrical tape on the point rail should do the trick, or grinding a bit of the point rail away to create more of a gap between it and the wheels should also work.

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