Ian,
Forget the adjustments and shaft cutting etc. If you are striking all other
clubs sweet, then I am adamant that you are not employing the same swing with your driver. Also, what loft is your driver? 10,5, even 12, is what you should be using. The more you fight with this problem, you will not correct it. Go to a pro and let him compare your iron and 3 wood swing to your driver swing. Having looked at your swing and speed, I would think that a regular shaft is not suitable for you. A stiff shaft should be more suitable. Come on Ian, get the head right!!!!!