I don't think this is quite right. If you look down the trunk of an infusion you will see that the trunk pinches the dagger about 2/3 of the way back. So the gybing takes place around the pinch point, not at the back, at least I think.
Does not matter much. Where ever you see it gybe it still uses the same principle. Mine looked like it gybed near the trailing edge. Actually about 1/2 forward of it. That was before the shimming material.
Dan
