Moving the engine forward helped, but just a bit. With the engine mounted according to the 5 7/8 spec (using the stock engine mount), the plane balances at the recommended 4 7/8 spec using a two ounce spinner weight along with six ounces of weight bolted to the bottom (as far forward as possible--in the engine heat exhaust chute). I thought about strapping the weight to the engine mount and going with a bit less weight, but figured that would surely rip the engine mount out during a possibly rough landing.

Anyway, this lets me fly with my Tru-Turn spinner and a total of eight ounces added weight in the front. I still have not taken the maiden flight, but this is the configuration I am going to use. Bad weather and work hours are delaying me.