Hey Connery,

I have one (I LOVE it), there are black stripes in the wing, I use them as reference for balancing.

Just turn the plane upside down and ask someone to put their finger under the black stripe at the end of the wing, you do the same (on the other wing of course ) and lift it.

It should give you an idea of the CG location.

The manual calls for 4cms (about 1 1/2 in) at the wingtips.

Joseph