Stjohn's RV-7

.5 hours.
got the trim tab spar riveted to the skin, but discovered a tiny crack in the outboard trailing edge of the trim tab skin, right at the apex of the bend, where the stress relief notch is. Apparently, that notch didn’t relieve enough stress, or I missed deburring a critical bit. Anyway, all I had to do was round out the stress relief notch to the size of a #10 drill bit and the crack went away. After thoroughly deburring that and double-checking all the other tight corners and edges, I’m ready to close the trim tab. I’m going to go ahead and finish building this trim tab, but I have an email in to Van’s. I suspect they’ll tell me to drill out the crack and build on. If not, no big deal, I know how to build a trim tab and I had one to practice on. I also have plenty to do while waiting for new parts.