Riveting the nose ribs into the HS skins were difficult. I ended up drilling out 4 rivets. One of them twice! These rivets were always on the nose. It was hard to get a bucking bar in there. I enlarged one of the holes and used a -4 rivet in the hole instead of a -3. You have to look hard to see it. The rivet has a slight edge on one side when you run your finger on it, but no big deal. I can smooth it out with a dremel.