So on to the rudder. As stated the instructions don't tell you how to modify here, but its not that difficult to do really. I first started out by epoxing in some scrap balsa into the tail area then trimmed it up to fit nice. I did the same to the rudder then used a couple of dubro hinges to finish.

To shap the leading edge of the rudder, I used an old bic lighter held at a 45 degree angle to "rub" it into shape lol