@Jim Waterman posted:George,
BE A MAN! Crack that thing open, isolate the DC leads on the motor and install a Dallee 4 amp reversing unit. AC ALL THE WAY!
Jim
I've done this on a couple of Ace / Darstaed engines. Very easy (hey, I did it), and much simpler than trying to juggle AC and DC power sources on a layout.
It should be noted that this thread started 3 years ago; I assume that @George S got it figured out by now.