getting ready to start using factory pre-bent skin

Ribs cut and formed

Flap Drive Plate Added

Use strips of .032 + .025 = .057 spacing required . Slip both under hinge

clamp hinge to bench (with .057 spacers)

ready to drill rivet holes in hinge

added weight to make sure it is Flat. (also check workbench level)

Rivet Rib tip BEFORE Flap Hinge

What happens if you don't Rivet rib first. (2) holes hard to rivet

Second Flap ready to rivet