I removed the outboard seat ribs. They needed deburring but not dimpling. Drawing says these will use #30 Universal rivets. Except there is one hole I dimpled because according to others this will interfer with wing later. Recall I dimpled this same location on the side skin.
This rib also needs platenuts, but it looks to me like the platenuts will interfer with riveting so I am NOT installing platenuts now. I'll do it after the side skin is riveted.