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<P>I have 3-rail O-scale Lionel track.  I want to use an insulated track section to trip a crossing signal.  When one rail is insulated off from the rest, the signal still trips.  I tried using just one piece of track and the signal trips.  I'm sure the insulated rail is not touching on either side - I even put tape inbetween to make sure it wasn't touching.</P> <P>I've tried it on a few pieces of track and get the same result.  What am I doing wrong?</P>
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