Cut VS-1014 into Left and Right and deburred as per directions.Misread Step 2 and began drilling #30 holes in every 4th hole in spar flange rather than in web, will correct by using NAS (Oops) Rivets in locations drilled #30 in error.Continued to match drill web as per directions. Deburred VS-1003 Spar and VS-1014(L/R). Drilled #40 hole in remainder of flange.