Recipe courtesy of America's Test Kitchen. I love to watch this show and learn new/different methods of cooking and baking. This just sounds like something we would really like.
"If using fillets that are 1/2 inch or thinner, reduce cooking time to 3 minutes per side. If using fillets that are 1 inch or thicker, increase cooking time on second side by 2 minutes, moving the fish to the cooler side of the grill after the second side has browned. If you cannot find red snapper, striped bass, halibut, and catfish can be substituted. Making the slashes in the skin requires a sharp knife. If your knife isn’t sharp enough, try cutting through the skin with a serrated knife. However, cut in one direction (don’t saw) and be careful not to cut into the flesh. If you choose not to eat the skin, be sure to remove it after cooking rather than beforehand. Serve fish with lemon wedges and our Rémoulade or our Pineapple and Cucumber Salsa with Mint."
Skin-on fillets will buckle when grilled because the skin will shrink back, pulling the flesh along with it. The fillets will remain flat if the skin is scored first, which prevents it from contracting more quickly than the flesh.