I fabricated (9) E909 stiffeners for the left elevator skin. The left side uses the shorter E909s in the area that the elevator trim tab will be assembled. Finished all stiffener to skin match drilling and deburring. Also, I needed to Alumiprep and Alodine the E909s and a few small remaining aluminum parts that were missed last time I used the chemicals. Although the HS and VS are assembled and riveted closed, I may begin to prime the inside of the elevator and rubber skins with self-etching primer. We'll see how that goes.