Not shown, but I riveted the nose/aft root rib to the main spar using two A6 rivets.
I then rotated the sing and cleco'd nose and aft ribs to the spar. I then riveted all ribs to the spar.
Deburred rear spar parts; the two halves, plus doublers, splice plate, and backer plate. Cleco'd the rear spar together, then joiin that subassembly to the aft ribs. Added more cleco's to support riveting (every other hole cleco'd).
Next up is to ensure rear spar is straight, then rivet it all together.