Looking Good
Hi Rich,
It's looking real good. I think the rudder size will be OK once you are flying. However, on the ground if one rotor comes up to speed a lot faster than the other the small rudder may not be able to compensate. The first flight I would point it into the wind as close as possible, give the rotors a hand spin and get on the throttle pretty good. The prop blast should give the rudder the control that you will need. I also would recommend the rate gyro set at 45 degrees to compensate for yaw and roll. I found this to be very affective and much better than the Co-Pilot for dual rotors.
Good luck,
Phil