I am scheduled to fly from ATL-DUB on a 763-Gulf in a couple of weeks. This is of course the one config that neither seatexpert or seatguru have maps for. Does anyone know which rows/seats if any have extra legroom on these? I know that 20 is the exit row, but beyond that it's not clear to me of 17CDE, 18CDE have the extra legroom and which window seats may have missing windows. Right now I can snag 17A, 18c, or 21G, but I'm not sure any of these would be any better than just sitting towards rear and hoping for an empty spot next to me. Any suggestions?