In this work session I began working on the left and right aileron spar. I worked match drilling the A403PP to the A-408, A-704L/R and matching those to the A-407 R and the A-406-1. I also mis drilled one of the A-704R and had to reorder it. Measure twice, cut once... I also noticed a an edge distance issue during parts matching and sent an email to Vans's...