HI all, I have built 6 CG 300's and I'm just about ready to cover my newest back up plane. I love flying my 300 with a Saito 180 turning a 16/10 prop. I feel their is no need to enlarge the rudder, just add more throw and use a 100 oz servo, I can knife edge all around the field , that really impressess the other flyers I use a 16 oz tank for fuel and pce the tank pretty close to the CG. I use 2 servos in the tail for the elevator and a 1400 mah battery and everything balances.
I also place some carbon fiber on the weakes place on the plane, I"ve had it snap in half on a not so hard landing.
Rcpete