Randy,
I first flew it without the wing tips, but the cg was so far forward I did not see any difference. There is an addendum sheet in the kit that specifies a new CG. Since I do not read japanese I started with it as per the plans. It is at least 2 inches further back now. I have to measure it from the TE because my metric rule is short. My only recommendation would be to find the Ono Special because it has bigger ailerons, which if you really are looking for a 3D plane it really needs. I got to visit Ono's shop in southern Tokyo and saw the original Ono Special and the bigger Demonstrator.

Jon