From what I have read, the only reported problem with the plane seems to be the alignment of the aileron slave rod and therefore the different travel of the upper and lower ailerons.

It must be a simple matter of geometry to align the rods so that the distance from the hinge point to the link pivot point is approximately the same on both. It looks like the GP manual is not quite correct here. Surely they will issue an update sooner or later.

Ari