I have a 97 376. A year ago it became difficult to unfurl and then furl the main. After some conversations with sail makers, etc. I was told that the main was getting old (12 years) and that it was probably bunching on unfurl an furl. I bought a new main from UK Sails Miami, but still have the problem. With the main sheet and vang on hard and the boom horizontal, the main will unfurl a short way, then jam or stop. On releasing the outhaul and then continuing to furl, it will then unfurl a few feet with really strong winching suddenly open unfurl a few feet, etc. It continues this way until eventually it unfurls , but with real difficulty. Furling is the same. I believe the bearings in the furling drum are ok and lubricated. This is such a problem that I can't really sail the boat. I know the new main is slightly heavier cloth and it has four spreader patches as well. Any thoughts from anyone would really be appreciated. This is a huge problem for me. Thank you John Anderson 865-384-5962 mobile or forum respond.