I had a moment to glue the trim tab ribs today. It's kind of awkward with the spar at a slope but I rigged up a way to clamp them. I'm sure other clamps would make things easier but I made do with what I had.
While I had the glue out, I attached the little center leading edge ribs to support the skin in the center. The piece of wood along the top is just there to distribute the clamping pressure. Not glued on.