I have played with the switches and the paths through the switches. I'm not sure what issues you foresee using the non-derailing, but I'm not anticipating any issues there, and my testing by sky-wiring the switch and running my battery powered locomotive through the two DS switches worked just fine. Remember, non-derailing only pertains to the entry side, the exit side is set to whatever route you desire (or maybe to one you don't desire!). However, there is only one potential trigger for the non-derailing if you wire it right, when you exit the DSS, the non-derailing logic should be such that the switch machine is already in the position that is being called for by the non-derailing rail connection, hence no switch movement.
As for the DZ-1008 relay wiring, I'm still not seeing how wiring the relays for the DSS like the Ross diagram can possibly work. I'm sure not going to wire them that way until someone convinces me with solid logic that it will. In two or three sentences I explained why it can't possibly work, and all the postings since have not refuted the facts as I presented them. I'm waiting to be proven wrong, but I just don't see it yet. That being said, it's hard to believe those diagrams from Ross have been around as long as they have and nobody has had a problem, that I don't understand!
The phone lines are open and operators are standing by! 
