"The 2D likes to tip over during ROG because of the large side profile and high stance."

I've seen this behavior before in a single rotor Gyro model. I was wondering what causes this and what would make a model behave better for ROG? I was thinking the rotor diameter was too large in ratio to the mass of the fuselage (I think 52" rotor and I'm guessing a total weight about 4.5 lbs).

Clint.