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[quote user="richhotrain"] I read through this thread very quickly, so I may be forced to retract everything that I am about to say. But I only see a need for one AR-1. First of all, you need gaps between the connecting turnouts of each crossover.  That will prevent shorts caused by reverse polarity. Now, each mainline can operate straight through without any difficulty. However, as soon as a train crosses over from one mainline to the other mainline, a short will occur.  To prevent a short, place gaps further up and down on the left side mainline, far enough apart so that the entire longest train is inside the gaps.  The reversing section becomes the left mainline between those gaps on the mainline and the gaps dividing the crossovers.  The green circles represent the gapped rails. <img style="width:704px;height:auto;display:inline;" src="http://i672.photobucket.com/albums/vv90/richhotrain/dogbone-1_zps169008a2.jpg" alt=" " /> So, only one AR-1 is needed.  Use Atlas turnouts if you can because they are already gapped and they are not power routing. If you use Peco turnouts, use Insulfrogs since they are already gapped, but they are power routing, so additional feeders may be needed to avoid dead sections of track.  Avoid Peco Electrofrog turnouts if at all possible.  I have nothing against Electrofrogs, but they do require more gapping and more wiring. To wire the AR-1, run a pair of feeders from the bus wires to the input side of the AR-1.   Any and all feeders from inside the reversing section should be connected to the output side of the AR-1.  No feeders inside the reversing section should be connected directly to the bus wires.  No feeders from outside the reversing section should be connected to the AR-1. Rich   <div style="clear:both;"> </div> [/quote]   This may no longer be true with the track plan modifications.
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