In this work session I rivetd the undersider of the left and the right ailerons. To do this, I placed the ailerons on top of a piece of MDF to give a flat working surface. Then I measured the ailerons angle on each end to check for twist, the difference was 0.2 to 0.1 degrees. I then riveted the end rivets, and followed that by squeezing the pullied rivets alont the lower part of the spar. After completing the right aileron, I then riveted the left aileron.