When you start to hit the ball poorly with the Driver, it is usually due to a fast tempo. Add some weight to the clubhead for some practice swings. To do this, leave your headcover on, you force yourself to be more deliberate at the start of the swing. It promotes more of a one-piece takeaway with your arms and shoulders moving together. Practice swinging 15 times slowly with the headcover on. When you take it off, the driver will move in a better sequence and on a better path.