John, one of the reasons I posted some of the details is I was thinking I might be the only purchaser of the buffer with a complex 2 rail layout. Dale himself was curious about differences with a 2 rail layout. We were in communication about 3 months before his passing, making plans for a visit with his prototype and test equipment. He lived about 1 1/2hours north of me. Unfortunately that never happened.
In 2 rail there is no outside rail electrically speaking. Either of the 2 rails can be connected to the common post or the 0-18V variable post depending on the last action of any or all of the reverser boards. These boards actuate by sensing the short circuit current when the lead truck crosses a reverse loop junction. I will post a picture of one. Unlike the DCC version, in high current AC applications there is quite a visible spark before the board reverses the connections. The only other difference I can think of in 2 rail is the use of .1microfarad capacitors connected across the 2 rails for the Legacy signal. 25 of these cannot be enough to affect anything.
I will figure this out, due to the size and large number of connections it may take some time. The good news is every wire runs through terminal strips and all have spade lugs on the wire ends so removing and replacing any connection is easy, there are just A LOT of them. I also have all the wiring diagrams with the color codes and all the track feeder locations with the rail gap locations.
