A productive day. First, I worked to drill and cleco the aft post assembly to the sill. This required pulling the aft section a bit forward to parallel the forward post. Then, I worked to flatten the two root ribs and fit in place. I then fitted two R-Bulks just aft of section 3 and 4. You can see the cleco's in Photo three. Note, the upper skin is just laying on the top -- good storage place. Next, I need to fit some angle brackets to anchor the vertical portion of the R-BULKs to the channel at the base of the root ribs. Then, dissasemble and prime before proceeding.