The fewer holes in the spar the better I'm sure. Newer Kitfoxes use a steel bracket that rivits to the spar, and slides inside the aluminum diagonal brace. That would be probably easier to use and drill to fit the existing holes. Then you only have to line up 4 holes instead of 8. With very carful measuring it can be done though. Might give Kitfox a call and see what they suggest. Jim Chuk