Going to be learning a lot of new skills on this project and that is going to take some time. Thought I would group that "learning" stuff in the category - R&D/Education. This will be hours spent learning and trying stuff that is not directly attributed to buiilding hours of the Bearhawk.
Solid rivets are a new skill for me. Never seen it done! A freind of mine up the road is building a Glasair Sportsman 2+2 and allowed me to come "help". It was good stuff. Even shared some things I had learned about back-riveting from Eric N and others. Feel a lot better about riveting.