Barry, I flew this plane most all last summer and really liked it allot but I sold it over the winter to fund other projects. I started out flying it with a Saito 180, it had good power but I had allot of problems with the Saito flooding due to it being inverted and the carb being lower than the tank. About mid summer I switched to a ZDZ 40 and the small gasser on this plane is just amazing and in my opinion the best setup for this plane but if I was going to set one up for glow again I think I'd go the same way you are with the 160fx. No matter what engine you use, if you like either of the smaller UCD's your going to love the Giant.
I never weighed the plane but it balanced with both engine setups just by moving the battery around.