Track Val: The wiring differences are really between electrofrog (all rail frogs) and insulfrog (plastic). I think Atlas makes both types; their snap switches are the insulfrog but slightly different from the Peco. The major difference in wiring is that in electro there is a hunk of rail shorting over whichever track is not set. If there is a chance of power coming from that way, you have to put a gap in. Plastic frogs, though, mean that you have a short stretch where there is no power. The wiring diagrams will work with either type (except the one with the gap in the outside rail). I use almost all Peco in my layout, but I have almost every variation made in the last 30 years! My latest track is all code 70 and it seems to work well. I also have a huge variation in wheel standards (going back to 1960ish) and I'm slowly trying them through the new track. Anything to NMRA standards should work fine. Is your LHS on Mt Pleasant, by any chance, or do you use another one?