After riveting the trailing edges of the rudder and elevators, a little bit of the wedge sticks out aft, past the skins. I thought I had read that I should now file the wedges so that skins and wedges are all flush and perpendicular to the control surface chord. I can't find this step in the instructions and see no note on the plans. Did I dream this? Is a file the best way to do this (if this step is actually needed)?