raising4daughters, thanks, I got confused between the Lionel 180 Watt Powerhouse and the Lionel 6-37947, GW-180, 180 Watt Transformer. I understand now. I may run a conventional on the Fastrack as well so the GW-180 may be good.
Final question, would a Post War ZW simply need a quick acting circuit breaker from the A post in series prior to the track?