Here's my 2 cents. I would epoxy a piece of hard balsa or dowel in the bad hole. Next, make a drill guide by drilling a 1/16" hole in a piece of aluminum. This will prevent your drill from wandering when you drill into the wing. Securely tape the aluminum drill guide in position on the wing. Verify your drill is perpendicular to the wing's surface, then drill your 1/16" pilot hole. Next, enlarge the pilot hole with a 1/8 drill bit. Carefully un-chuck the drill bit and leave it in the hole. This will pin your wing in place and allow you to drill the second hole without having the wing shift on you. Keep increasing your drill bit size until you have the correct hole size. Finish enlarging the first hole and you are done.