Hi Colin, I believe that the correct method to align the front wheels is to centre the steering wheel first and align each front wheel whilst the steering wheel is in the straight ahead position. Using this method the steering wheel will be centred with the car travelling in a straight line. Some people may be tempted to remove the steering wheel and reset to the centre position but this interferes with the indicator cancelling position so that it cancels quickly in one direction and much slower (greater rotational angle) in the other. Hope this helps