RE: kevlar vs peel ply hinges
wyo, indeed it looks like the wing I have, on close examination, used peel ply. The material is almost a perfect match to a supplier of peel ply(easy composites in the UK). The peel ply has a red marking on it which is the giveaway. Probably meant to help differentiate it from fiberglass in the cured product.
BTW, on a old thread you had a video on vimeo about skin hinges. But it is no longer. Do you have the video still?