Hinge slotting for dummies...
Later, when the hinges do wear out, you may find you need to replace wood to put in new hinges. When I do that, I strip off 3/8 inch of the TE of the fixed surface and completely replace the control surface. (solid balsa tailplanes)
that of course assumes the plane slast a LONG time.... The hinges take many hours of flying before they fail.