After learning of the long lead time on my wing kit, I wasn't in too much of a hurry to complete the left elevator and the trim tab. It wasn't difficult, but I did have to torque the control horn as I riveted the skin to the trim tab spar. I have a little bit of flex in the skin of the elevator. Our local EAA build advisor said it was fine and that he hard a little of that on his RV-6. Not sure where some of the tolerances built up.