Thanks Sean - Your hubs are very neat~ I like the hinge being wide. Your comments about stiffness of hinges is interesting, I think I have been overconcered about hinge flexibilty, and should use stronger (thicker) code 5 plastic.
Incidence - When I had non-delta hinges i needed negative incidence to get satisfactory spinup. However with 15 degrees angled hinges the blades are at zero. When sitting on the ground in a breeze the rotors spin the wrong way, pick up the plane, hold it nose high, and the rotors stop and start spinning the proper way.
Colin