I know squat about the right prop size on these electrics. I went to the LHS and he helped me pick the plane. Then I told him to get me what I need to complete it. So he picked the servos,batt,motor,prop,etc...etc.. I guess I'll know after several flight if the prop is right or not. I will keep track of how long the pack will fly the plane and how it pulls from a hover. Maybe you can tell me then if it's the right set up or not.
David