This was before reinstalling HS 404 and HS 405. I remeved 13 rivets in on each end, each side of the rear spar for more room to use a straight cup set.
I too completed the HS SB this weekend. Took 8 hours from start to finish over 2 days. Made somewhat easier as I don't have any paint on it and had not mounted it. The best assistive device was making some v-blocks to hold it upright. I used those for most of it including the drilling of the angle rivets and the riveting of the doubler.
Added the notches per the bulletin. I had no notches during the initial build.
Tapering the spar flanges was fun! Glad Vans gave us the tip to use the stainless sheet in-between the layers of skin. Was fairly easy with a dremel tool.