Finished prepping main spar, prepped rear spars and ribs, deburred, primed, and riveted almost all of the skeleton. Drilled the root front rib too large and will have to order another. A6 rivets should use #10 bit or 13/64", not whatever huge bit I chose! We got a water rescue call for a plane that flipped over on Jaybird Shoals and I could not finish the riveting. Only about 30 minutes of work remain.