Worked on the fuselage frames F-811, F-812, F-807, F-808, F-809, F810. Working from the plans I'm completeing all the steps needed for each frame. Drilling holes and dimpleing all the attache points required. I messed up and used the machine counter sink on F-812. I will need to reorder two frames to fix this mess up. I should have dimpled this frame. The thickness of the material is .035 and for a Number 4 rivet you need .050 to machine counter sink.
