I have to admit; we're finding the riveting of the bottom wing skin a tad challenging. Another hour for both of us (hence two 'man-hours') and all we managed to do is finish the three inboard wing walk ribs. At this rate it will take us ages. We're not particularly fast workers at the best of times, but this limited access riveting is proving to be very awkward. I also cleaned all the 'still-not-set' silicon from the pitot tubing before we started. Even having the heater and dehumidifier in there hadn't helped. I'll get some fresh stuff and try again. On the bright side, my order from Cleaveland for the wing tip attach screws/nutplates and the drilling jig, #4 dimple die and csk cutter, drills & reamers, etc turned up today, so that was nice.
