Completed riveting left wingtip. CJ helped me move wing to rack. Installed stall warning cover plate. Moved boat outside and cleaned garage. Rolled wing storage rack with left wing to storage area, covered. Picked up shop and put away tools. Temporarily installed aft ribs to right main spar and numbered. Removed and completed deburring of small areas on all wing ribs. ScotchBrited and cleaned aft ribs, primed.