This may be an old thread, but for future reference, here's a great way to do it...

Drill the 1/4" hole in either the Wing or the Fuse (Which one is determined by which is easier to do the next part with)

Drill the other hole (Let's say that the second hole is in the Fuse) close to where it is needed by using any of the previous methods - then enlarge the hole.

Now drill a 1/4" hole in a piece of plywood (Aprox 1" x 1")

Put the wing in place, adjust the incidence, and place the plywood plate over the dowel and glue it to the inside of the fuse.