One of the most common mistakes people make when putting up shade sails is not leaving enough room at the corners — and once your fixing points are set in concrete, that's a very expensive problem to fix. Most DIYers focus on the sail itself and forget that you need at least 400–600mm of clearance outside each corner edge to allow room for turnbuckles and cable trace. Too little ga... https://www.diyshadesails.net.au/how-to-install-diy-standard-shape-shade-sail/