My point was that the leading edge of a control surface is radiused. A proper hinge will be centered at the center of radius. You can't do that with a CA hinge which means it is fundamentally in the wrong place. But like I said, for the most part it's not an issue. I just find it a lot easier to drill holes than to try to cut slots and keep them all lined up.

If you ever saw any of my planes you would see that every control surface is dead-aligned with the flight surface that it's attached to.