With the wingtips in place I could see a couple of areas where the tips needed to be built up to sit flush with the wing surface. I mixed up some epoxy and microballoons and applied where needed. When dry I sanded as necessary. I will have to repeat this another time to fill in some more low spots and pin holes. I'm not sure if I will prime the tips or just leave them.
Just the final sanding and filling to go and the wingtips will be done.