Most guys that build a Kitfox seem to have a somewhat heavy left wing when the first fly it, from what I hear on this forum. I guess it makes sense because if you build a perfectly rigged, symmetrical airplane, you still have the built-in left turning tendency due to engine torque and other reasons we all learn about in our pilot training. I think the Kitfox build manual should recognize this fact and suggest that after you have finished rigging the wings symmetrically in the normal manner, THEN go and tweak each strut rod end say 1/2 turn to increase AOA on the left wing and decrease it on the right wing. By doing this when everything is exposed before covering it is a lot easier and many folks may not need to touch it when they start flying.