A plate thick enough to accept a #8 screw countersink would also have an unusual appearance to it. IIRC, the head height for that screw is 0.072", so it would become a very thick plate, 0.080 or more.
Empennage Passed Pre-close Inspection
Wings mostly done
Fuselage assembly, it's a riveting job!
Dash 8 day job is financing the RV8
Donation till September 2023