My '68 Coronet is hounds tooth. The 1st mat I bought was the nice rubber style, but the cuts didn't line up with the brackets and other items in the trunk, and like you mentioned, some areas curled up. I bought another one in a bag, and it was that paper-thin cheap crap with the felt on the backside. It slid around on the painted trunk floor. Finally I bought a big uncut rubber sheet of hounds tooth mat from Legendary for $56 at the Nats. Using newspaper taped together as a template, I carefully cut out a mat that conforms to every feature in the trunk. I couldn't be happier with it
