I was thinking of just running a thin strip along the trailing edge of the aileron. You have about 1/8" thickness of aileron to work with so a nice little thin strip of CF might work nicely.
Tonight I did a low ke pass (3 - 4" off the ground) across the black top. One of the guys said, "That looks nice...how hard is it to hold", so I took my right and off the transmitter and put it up in the air. He gawked and said, "man that's cool!". I had to agree with him. Don't get me wrong, I'm not trying to brag, the plane is just that good.