I started work officially today on the empennage after taking a few days to finish getting my shop set up and doing my third control surface practice kit. The first kit I did with Synergy in an all day sheet metal basics class. Then I did two more at home to hone the techniques. I'm still having trouble riveting the last rivet connecting the skins to the side rib flanges near the trailing edge. In the Synergy class we placed a beat up looking piece of steel on the shop head end of the rivet to indirectly back rivet those rivets. Today I broke the edges of the rear spar reinforcement bars (HS-609) with a vixen file and rough rounded the ends with the band saw and then refined with the vixen file. I definitely spent more time than needed on the edges, but once I figured out how to use the file it went much faster.