Got the Thoroughbred RTR HO package for xmas.  set it up and ran fine until evening of 26th.  when issues began, switching to reverse loci would die. inspected track, powerpack - all fine.  loci appeared OK, pulled casing off and nothing out of order.  cleaned track. lubricated loci.  if it sits for a while seems to start ok... until today, now seems will not start foward or reverse.  Any ideas, or did I just get a lemon?