I have a Big Hauler that I set up for the holidays every year.  I would like to add a reversing loop to each end of a straight piece of track.  I would like to have the train run uninterrupted while entering each return loop and heading back in the opposite direction. Knowing that the loop will cause a short circuit if I tie it back in using only a manual turnout, are there any simple connection options.  For example, is there a short section of plastic track that can be inserted in the loop.  If the nonconducting section was about an inch long, the circuit would be broken while short enough for the train to pass over without the wheels completing the circuit.