RE: Foam Seawind EP from Great Planes...
I'm using a Spektrum DX6i radio. To reach scale-like flying and smooth control I had to dial +100% expo on the ailerons and reduce dual rate to about 40%! Can't believe the specs throws on this thing. Almost like wanting to make people loose control on maiden?
So to all of you building this plane, a word of caution, it is a hot little plane and wisdom tells you to experiment it on calm days at the beginning.
Finally about the CG, I have reached excellent balance without adding lead, using a 2100 MHA 3s lipo.