Reply to "Building a O-Gauge yard with Switches using Lionel Fastrak"

@SteveH - While I'm waiting for some items for another project, I'm wanting to make an Atlas O-72 Single Slip Switch; the initial being a proof of concept/prototype.  Interesting enough the hang-up is I'd like to have metal frogs in the design but that may not be doable.  (Atlas is now using plastic for the inner frogs of the 45 degree crossovers.  Go figure.)  I need two for my layout as currently designed.  And, yes, I know I could use two O-72 switches and a 45 degree crossover but 1) space is a big issue and 2) the tracks need to be fairly close together in the yard.