A lot of time spent today with not much to show. GAM gave me a hand today priming the mating surfaces of the left flap ribs & brackets, thank you for that, whilst I completed about 90% of the skin deburring. We then did some trial fittings of the ribs in the skin to check for high & low spots making some adjustments to most of the ribs. The rib flanges now follow the curve of the skin well so I'm happy the way that experiment turned out.