I just purchased the Locomotive and received it this past Friday.  It surges when it runs.  It surges bad enough that the few cars it was pulling was running together and then loosening up, if you follow what I am saying.  This surging is in time with a noise coming from the loco.  I have ran this loco backwards forwards changed directions and it doesn't seem to be getting any better.......It should run silky smooth!!!!!

     I sent an email to the customer service this morning, but wanted to see what you all thought...