Not quite sure I understand the issue. Once you release the tiller, you cannot change the sail setting. This is actually useful if there's a strong wind and you land the boat- you leave the sail up, and the wind keeps pushing the boat into shore, and it doesn't drift (assuming you're hopping on and off). While you are driving, you can bring the sail to the zero setting and you'll eventually drift to a stop. But once you stand up, you don't have control over it.