Thanks in advance,
Seems that after 10 minutes, the engine hesitates and then eventually stalls opposite the terminal track straight with the track plug in kit supplied Bachmann speed controller Model 44211.  Is there a more powerful speed controller?  Does it need a second one on the same opposite side position? Seems unlikely for such a short layout?  I did not add any track.  And adding extra Xmas rolling stock only makes the tiny engine suffer worse, so I figure it was built and designed to only run with this supplied set of cars.  Rail cleaning with some rubbing alcohol only subsides the issue for a very short time.
Appreciate the read and any thoughts.