Understanding how to set up your sails to allow for a fast-forward mode is especially important in one-design sailing. This means understanding how to twist your sails, and knowing the difference between reaching and going fast upwind. Bearing gain should come with as little compromise to the height as possible. Shifting into a fast-forward mode could be as simple as applying a little backstay without a sheet adjustment, or maybe easing the mainsheet to allow the boat to unload and go faster forward. In a planning boat, say a 505 or 470, there's a fine line between going fast and sailing out of your lane, but you need to set up your sail trim to be able to do both. At some point, the extra load put on your foils by going fast should help you hold your lane. To replicate settings for a variety of modes and wind conditions, mark your sheets, backstays, and any other adjustment. If you spend a lot of time trying to get the sails set up properly, chances are you'll miss a brief window of opportunity to go fast.