Build it as per plans. Look at all the photos posted here and in the Photo Gallery, you will almost never see rudder offset. Some like to have an airfoil shape in the vertical fin, with the flat side outboard. If you do that, Be sure to sand some phillips entry into the outboard side. I have a OTS model, built by one noted modeler for another, and it had this airfoil shape in the vertical fin. When I acquuired the model, it looked like it had hardly been flown, and after my first flight or two, I knew why. The airplane turned in on launch and the lines got quite slack . I'm getting older and can't back pedal like I used to! I looked for the cause and tried trimming things every way to Sunday, and I finally looked right down the length of the fuselage from nose to tail. I could see all of the airfoiled side of the rubber, and none of the flat side. Sitting on the ground and having prop wash hit it, it was the same as putting in left rudder. When I got the airplane in the air, it got better, but still needed some trimming. I placed a straight edge long enough to reach the nose on the flat side of the vertical fin, and the edge laid about 1/2 inch to the right of the center line at the spinner, confirming what I thought I saw looking down the nose. I made a nice, straight cut at the base of the vertical fin and cut it off. I tack glued it to the fuselage and rechecked it with the straight edge. Now the edge against the flat side was about 1/8" to 3/16" to the left of the center of the spinner. The next test flights had a nice, straight take off. Now I can retrim the model and touch up the finish on the fuselage. The way this is supposed to work, is the airfoil side creates "lift" or low pressure on the inboard side and pulls the back of the fuselage in and the nose out, helping with line tension. This isn't anything new and has been done for years. It had a much more subtle affect than a cranked out rudder, and looks better also in my opinion. When in doubt, always follow the plans and instructions.
Type at you later,
Dan McEntee