Jim/Oli,
would it not be better to use a solid material (such as end-grain balsa w/ ply inserts where bolts go through, or ply itself) laminated with carbon in these higher strength area's where the gear and wings are attached than the honeycomb? While the honey-comb technique is indeed cool and i'm sure makes some lighter parts, it seems like it would take more know-how and testing to get the perfect structure with the stuff than with more commonly used techniques.