Set up your Golf Improvement System as shown with the Inner Swing Arm about 12-14 inches in front of the ball position and the Bristles pointing directly upwards. Make a few half swings to ensure you are in the correct position and clipping the top of the Bristles as you swing through.
Next, move the Swing Arm another 1-2 inches further forwards (away from the ball position) and again swing through, still trying to touch the top of the Bristles. This will give you the feeling of extending correctly in the through swing. Practise the motion for 2-3 minutes at a time and the feeling will soon become engrained in your mind.