Balsa blades are too darn aggrevating! I like your design but its way too much work for me. the hub at least. I am trying to keep the S in spad LOL plus i counldnt get the single gyro to fly or none of them without wings. Well i did make one flight with the single gyro but it lost control and crashed. Anyway i made me some ball bearing hubs for my rotors and plan to test this afternoon. The gyro is cool tough and stands still in a stiff breeze!