In this sail loft we use hand-sewn rings. Either brass or rope grommets. We can use a LOT of them and we are not the only sailmakers to do this. We do make our own liners. I don't know if others do, but we do and it is time consuming, but worth it. And here is why. I have found that liners often crack, or are very thin OR are too thick. Sometimes the liner can actually cut the stitching around the ring. Here we have "liner man" and he is VERY important. Thanks "liner man"! A plug for Port Townsend Foundry. BEST BEST BEST stuff you can get anywhere. Not to mention Pete and Cathy are super nice people. http://www.porttownsendfoundry.com/ Check them out.