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<P mce_keep="true">Thanks, David. I'll bet you are right.  I was so focussed on the decoder as the problem (these NCEs will run away if "stop on DC" is not written even on DCC) that I forgot to think clearly.  I'll bet the motor is not isolated completely.  That's what it seems like now because it must be picking up current that is bypassing the decoder.  I must have pushed aside the bit of kapton tape or something when I pushed the motor back in place.</P>
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