Notched noses of ribs and added leading edge stringer for topside skin. Installed aileron to check clearance for top skin and discovered that pitot tube needed to be moved slightly. Per the design, the pitot tube runs in the gap between the rear spar and the front of the aileron. As it passes through the rib inboard of the aileron, it also has to clear the aileron on one side and the inboard aileron hinge on the other. To provide more clearance I had to pull the pitot tube and elongate the hole in the rib that it passes through. After a bit of trial and error, I was able to provide another 1/8" clearance and still fit through the appropriate hole in the aileron hinge. Measured and prepped upper skin sheet number 1. This meant scarfing the outboard edge where sheet number 2 will mate with it. Epoxied, clamped, and stapled into place.