RE: Pitts 1/3 hard to turn right
Most larger scale planes need SOME rudder input to turn especially to the right. This is the way full scale planes are and the larger the model the closer it clones the flying characteristics of full scale. I had a 1/3 Pitts many years ago and it caught me completely unawares on the first flight and I almost lost it. I programmed in some rudder with my ailerons and never looked back.
Different pitch props will make a small difference but rudder input is the only "cure".