Finished Dimpling HS-901 Skin Deburred & Dimpled all HS-904 Main Ribs and HS-905 Nose Ribs. Deburred holes in HS-902 Front Spars, HS-903 Rear Spars, HS-907 Front Spar Doubler Plate, and HS-906 Rear Spar Doubler Plate. Re-fabricated HS-908-L and HS-908-R attach angles. Set up drillpress jig for spar countersinking and started to countersink HS-902 Front Spar.