Reply to "Short in 60 Trolley (update, well not reallly)"

Thanks David and Rob, but the problem was solely of my doing and nothing to do with the Trolley or the circuit breaker.  My small track now spans 2 rooms, and a section of it is between some boxes.  In that section I had a train derailment from a week or so before, and never picked it up.  I didn't notice it when I started testing the trolley in the other room, where the ZW is.  The circuit breaker was reacting to the short caused by that problem, nothing to do with trolley stuff.  After I fixed my dumb mistake, the trolley worked great.