A friend of mine ask for instructions on how I modified/prep my PECO Turnouts, most of what I did came from a on-line clinic reference by Rick Bell (http://dccinstallsandsales.com). I presently do not remember were I downloaded it from most likely from one of the MRR Forums or Yahoo Groups. email me if you would like a copy it's little over 2mb in size.
A backside view of a unmodified PECO Turnout note the existing jumper for the frog
First thing I did was remove the spring that holds the points in-place against the rails as I am going to use tortoise switch machines. I discovered, I had two different ways PECO manufactured their turnouts as shown below.
Once the spring was removed. I had to drill a hole in the throw bar for the switch machine.
Next is to isolate the frog and wing rails from the points, by cutting two gaps in the wing rails.
I used a Zona Jeweler saw recommend on Fast Track website with No 2 Saw Blades (.028 x .013 x 43TPI) for the gaps.
Added jumpers from outside rails before the rail gaps to the frog, so to provide addition connectivity for the points.
Add a wire for the frog polarity change from switch machine. There is a couple ways of do this I solder the wire at the junction point of the existing jumpers.
To complete the isolation of the frog. I install the PECO insulated rail joiners on the two frog rails or you can use the metal one's and gap the rail at your preferred location.