[quote]Carefully remove the Ultracote covering approximately 3/8” in from your marks towards the center section of the wing. Scuff the exposed constructed area. Apply medium to heavy fiberglass cloth, covering the exposed area, with an epoxy based resin. Repeat the process for the other side of the wing. Allow to cure over night. Trim and sand any excess.

With reference to the new instructions, wouldn't it be safer to extend the cloth further out beyond the wing seat?
If the glass finishes inside ,or at, this line, there's a stress riser there. I've seen a couple of wings fail that way.