Tomi,
I have been flying with a 13/6 and it was too much for the motor to rev right. I have since put on a 12.75/3.25 and it flies like it's on rails! The engine spins like it is going to rip the nose off, but it still doesn't go too fast. Just the way I like it!
Good luck on the UCD3D! Keep me posted.


Red