Now I got my trusty Elmer's wood filler, a cup of water and a spoon ready. I started by smearing the filler in the corner between the fillet base and the fuse. Once filled, the excess was removed by pressing the wet spoon into it and running it along the fillet.

Once I had the basic shape, I wet my finger and smoothed out the wood filler.

Let dry, remove wing from fuse, and it's ready for sanding.