Verified spars were still at 90 degrees. Didn't like the looks of the original tip ribs from Vans (E-903, E-903), so I ordered replacements. These tip ribs are not much better, in pretty bad shape, scratches, some corrosion, serious Scotchbrite work was needed on them. I will Alodine and Epoxy prime but still, needed to repair before attempting to shape.